Predicted mutation
evidence seq id position mutation freq annotation gene description
RA NC_000913 507,271 A→C 6.0% noncoding (68/84 nt) chiX → sRNA antisense regulator of OM chitoporin ChiP(YbfM), Hfq‑dependent

Read alignment evidence...
  seq id position ref new freq score (cons/poly) reads annotation genes product
*NC_000913507,2710AC 6.0% 233.3 / 7.0 67noncoding (68/84 nt)chiXsRNA antisense regulator of OM chitoporin ChiP(YbfM), Hfq‑dependent
Reads supporting (aligned to +/- strand):  ref base A (33/30);  new base C (2/2);  total (35/32)
Fisher's exact test for biased strand distribution p-value = 1.00e+00
Kolmogorov-Smirnov test that lower quality scores support variant p-value = 1.98e-01

ACGCCTGATGGCGGTCCAAAAAAAAGAGTCATCTTGCCTAAGAGTATTGGCAGGATGGTGAGATTGAGCGACAATCGAGTTACACCGTCGCTTAAAGTGACGGCATAATAATAAAAAAATGAAATTCCTCTTTGACGGGCCAATAGCGATATTGGCCATTTTTTTAGCGCAACATTTGCGGCAAATTCCCTTCTCCATACAGGTGTAGTGCACCGACCGCGACCACATATCGCCCCGGCGGCATGGCGCGTAATTTATCCCGCCAGGCGAGATTTCGCTGATGCATCAGCACATC  >  NC_000913/507123‑507417
                                                                                                                                                    |                                                                                                                                                  
aCGCCTGATGGCGGTCCAAAAAAAAGAGTCATCTTGCCTAAGAGTATTGGCAGGATGGTGAGATTGAGCGACAATCGAGTTACACCGTCGCTTAAAGTGACGGCATAATAATAAAAAAATGAAATTCCTCTTTGACGGGCCAATAGCGa                                                                                                                                                    >  4:1204629/1‑149 (MQ=255)
                            tCATCTTGCCTAAGAGTATTGGCAGGATGGTGAGATTGAGCGACAATCGAGTTACACCGTCGCTTAAAGTGACGGCATAATAATAAAAAAATGAAATTCCTCTTTGACGGGCCAATAGCGATATTGGCCATTTTTTTAGCGCAACa                                                                                                                           <  2:741660/146‑1 (MQ=255)
                            tCATCTTGCCTAAGAGTATTGGCAGGATGGTGAGATTGAGCGACAATCGAGTTACACCGTCGCTTAAAGTGACGGCATAATAATAAAAAAATGAAATTCCTCTTTGACGGGCCAATAGCGATATTGGCCATTTTTTTAGCGCAACa                                                                                                                           >  1:741660/1‑146 (MQ=255)
                               tCTTGCCTAAGAGTATTGGCAGGATGGTGAGATTGAGCGACAATCGAGTTACACCGTCGCTTAAAGTGACGGCATAATAATAAAAAAATGAAATTCCTCTTTGACGGGCCAATAGCGATATTGGCCAttt                                                                                                                                        <  4:969343/130‑1 (MQ=255)
                               tCTTGCCTAAGAGTATTGGCAGGATGGTGAGATTGAGCGACAATCGAGTTACACCGTCGCTTAAAGTGACGGCATAATAATAAAAAAATGAAATTCCTCTTTGACGGGCCAATAGCGATATTGGCCAttt                                                                                                                                        >  3:969343/1‑130 (MQ=255)
                                      tAAGAGTATTGGCAGGATGGTGAGATTGAGCGACAATCGAGTTACACCGTCGCTTAAAGTGACGGCATAATAATAAAAAAATGAAATTCCTCTTTGACGGGCCAATAGCGATATTGGCCATTTTTTTAGCGCAACATTTGCGGCaaact                                                                                                              >  4:636754/1‑147 (MQ=255)
                                       aaGAGTATTGGCAGGATGGTGAGATTGAGCGACAATCGAGTTACACCGTCGCTTAAAGTGACGGCATAATAATAAAAAAATGAAATTCCTCTTTGACGGGCCAATAGCGATATTGGCCATTTTTTTAGCGCAACATTTGCGGCAAACTc                                                                                                             <  3:636754/149‑1 (MQ=255)
                                              ttGGCAGGATGGTGAGATTGAGCGACAATCGAGTTACACCGTCGCTTAAAGTGACGGCATAATAATAAAAAAATGAAATTCCTCTTTGACGGGCCAATAGCGATATTGGCCATTTTTTTAGCGCAACATTTGCGGCAAATTccc                                                                                                           <  1:719182/144‑1 (MQ=255)
                                              ttGGCAGGATGGTGAGATTGAGCGACAATCGAGTTACACCGTCGCTTAAAGTGACGGCATAATAATAAAAAAATGAAATTCCTCTGTGACGGGCCAATAGCGATATTGTCCATTTTTTTAGCGCAACATTTGCGGCAAATTccc                                                                                                           >  2:719182/1‑144 (MQ=255)
                                               tGGCAGGATGGTGAGATTGAGCGACAATCGAGTTACACCGTCGCTTAAAGTGACGGCATAATAATAAAAAAATGAAATTCCTCTTTGACGGGCCAATAGCGATATTGGCCATTTTTTTAGCGCAACATTTGCGGCAAATTCCCTTCTcc                                                                                                     >  1:122563/1‑149 (MQ=255)
                                                 gCAGGATGGTGAGATTGAGCGACAATCGAGTTACACCGTCGCTTAAAGTGACGGCATAATAATAAAAAAATGAAATTCCTCTTTGACGGGCCAATAGCGATATTGGCCAttttt                                                                                                                                      <  3:188568/114‑1 (MQ=255)
                                                 gCAGGATGGTGAGATTGAGCGACAATCGAGTTACACCGTCGCTTAAAGTGACGGCATAATAATAAAAAAATGAAATTCCTCTTTGACGGGCCAATAGCGATATTGGCCAttttt                                                                                                                                      >  4:188568/1‑114 (MQ=255)
                                                    ggATGGTGAGATTGAGCGACAATCGAGTTACACCGTCGCTTAAAGTGACGGCATAATAATAAAAAAATGAAATTCCTCTTTGACGGGCCAATAGCGATATTGGCCATTTTTTTAg                                                                                                                                  <  4:1179519/115‑1 (MQ=255)
                                                    ggATGGTGAGATTGAGCGACAATCGAGTTACACCGTCGCTTAAAGTGACGGCATAATAATAAAAAAATGAAATTCCTCTTTGACGGGCCAATAGCGATATTGGCCATTTTTTTAg                                                                                                                                  >  3:1179519/1‑115 (MQ=255)
                                                              aTTGAGCGACAATCGAGTTACACCGTCGCTTAAAGTGACGGCATAATAATAAAAGAATGAAATTCCTCTTTGACGGGCCAATAGCGATATTGGCCATTTTTTTAGCGCAACATTTGCGGCAAATTCCCTTCTCCATACAGGTGTAGTGc                                                                                      >  2:827151/1‑149 (MQ=255)
                                                              aTTGAGCGACAATCGAGTTACACCGTCGCTTAAAGTGACGGCATAATAATAAAAAAATGAAATTCCTCTTTGACGGGCCAATAGCGATATTGGCCATTTTTTTAGCGCAACATTTGCGGCAAATTccc                                                                                                           <  1:863353/128‑1 (MQ=255)
                                                              aTTGAGCGACAATCGAGTTACACCGTCGCTTAAAGTGACGGCATAATAATAAAAAAATGAAATTCCTCTTTGACGGGCCAATAGCGATATTGGCCATTTTTTTAGCGCAACATTTGCGGCAAATTccc                                                                                                           >  2:863353/1‑128 (MQ=255)
                                                               ttGAGCGACAATCGAGTTACACCGTCGCTTAAAGTGACGGCATAATAATAAAAAAATGAAATTCCTCTTTGACGGGCCAATAGCGATATTGGCCATTTTTTTAGCGCAACATTTGCGGCAAATTCCCTTCTCCATACAGGTGTAGTGCa                                                                                     <  1:827151/149‑1 (MQ=255)
                                                                      aCAATCGAGTTACACCGTCGCTTAAAGTGACGGCATAATAATAAAAAAATGAAATTCCTCTTTGACGGGCCAATATCGCTATTGGc                                                                                                                                             <  3:1244215/86‑1 (MQ=255)
                                                                      aCAATCGAGTTACACCGTCGCTTAAAGTGACGGCATAATAATAAAAAAATGAAATTCCTCTTTGACGGGCCAATATCGCTATTGGc                                                                                                                                             >  4:1244215/1‑86 (MQ=255)
                                                                      aCAATCGAGTTACACCGTCGCTTAAAGTGACGGCATAATAATAAAAAAATGAAATTCCTCTTTGACGGGCCAATAGCGATATTGGCCATTTTTTTAGCGCAACATTTGCGGCAAATTCCCTTCTCCATACAGGTGTAGTGCaccgaccg                                                                              >  3:374066/1‑149 (MQ=255)
                                                                       cAATCGAGTTACACCGTCGCTTAAAGTGACGGCATAATAATAAAAAAATGAAATTCCTCTTTGACGGGCCAATAGCGATATTGGCCATTTTTTTAGCGCAACATTTGCGGCAAATTCCCTTCTCCATACAGGTGTAGTGCACCGACcgc                                                                             <  2:122563/149‑1 (MQ=255)
                                                                        aaTCGAGTTACACCGTCGCTTAAAGTGACGGCATAATAATAAAAAAATGAAATTCCTCTTTGACGGGCCAATAGCGATATTGGc                                                                                                                                             <  1:215953/84‑1 (MQ=255)
                                                                        aaTCGAGTTACACCGTCGCTTAAAGTGACGGCATAATAATAAAAAAATGAAATTCCTCTTTGACGGGCCAATAGCGATATTGGc                                                                                                                                             >  2:215953/1‑84 (MQ=255)
                                                                          tCGAGTTACACCGTCGCTTAAAGTGACGGCATAATAATAAAAAAATGAAATTCCTCTTTGACGGGCCAATAGCGATATTGGCCATTTTTTTAGCGCAACATTTGCGGCAAATTCCCTTCTCCATACAGGTGTAGTGCACCGACCGCGAc                                                                          >  3:469157/1‑149 (MQ=255)
                                                                            gAGTTACACCGTCGCTTAAAGTGACGGCATAATAATAAAAAAATGAAATTCCTCTTTGACGGGCCAATAGCGATATTGGCCATTTTTTTAGCGCAACATTTGCGGCAAATTCCCTTCTCCATACAGGTGTAGTGCACCGACCGCGACca                                                                        <  4:469157/149‑1 (MQ=255)
                                                                                 acacCGTCGCTTAAAGTGACGGCATAATAATAAAAAAATGAAATTCCTCTTTGACGGGCCAATAGCGATATTg                                                                                                                                               <  4:534815/73‑1 (MQ=255)
                                                                                 acacCGTCGCTTAAAGTGACGGCATAATAATAAAAAAATGAAATTCCTCTTTGACGGGCCAATAGCGATATTg                                                                                                                                               >  3:534815/1‑73 (MQ=255)
                                                                                       tCGCTTAAAGTGACGGCATAATAATAAAAAAATGAAATTCCTCTTTGACGGGCCAATAGCGATATTGGCCATTTTTTTAGCGCAACATTTGCGGCAAATTCCCTTCTCCATACAGGTGTAGTGCACCGACCGCGACCACATATCGcccc                                                             <  3:1204629/149‑1 (MQ=255)
                                                                                                 tGACGGCATAATAATAAAAAAATGAAATTCCTCTTTGACGGGCCAATAGCGATATTGGCCATTTTTTTAGCGCAACATTTGCGGCAAATTCCCTTCTCCATACAGGTGTAGTGCACCGACCGCGACCACATATCGCCCCGGCGGCATgg                                                   >  4:78480/1‑149 (MQ=255)
                                                                                                    cGGCATAATAATAAAAAAATGAAATTCCTCTTTGACGGGCCAATAGCGATATTGGCCATTTTTTTAg                                                                                                                                  <  1:305830/67‑1 (MQ=255)
                                                                                                    cGGCATAATAATAAAAAAATGAAATTCCTCTTTGACGGGCCAATAGCGATATTGGCCATTTTTTTAg                                                                                                                                  >  2:305830/1‑67 (MQ=255)
                                                                                                     ggCATAATAATAAAAAAATGAAATTCCTCTTTGACGGGCCAATAGCGATATTGGCCATTTTTTTAGCGCAACATTTGCGGCAAATTCCCTTCTCCATACAGGTGTAGTGCACCGACCGCGACCACATATCGCCCCGGCGGCATGGcgcg                                               >  3:802159/1‑149 (MQ=255)
                                                                                                        ataataataAAAAAATGAAATTCCTCTTTGACGGGCCAATAGCGATATTGGCCATTTTTTTAGCGCAACATTTGCGGCAAATTCCCTTCTCCATACAGGTGTAGTGCACCGACCGCGACCACATATCGCCCCGGCGGCATGGCGCGTaa                                            <  3:78480/149‑1 (MQ=255)
                                                                                                              ataaAAAAATGAAATTCCTCTTTGACGGGCCAATAGCGATATTGGCCATTTTTTTAGCGCAACATTTGCGGCAAATTCCCTTCTCCATACAg                                                                                               <  3:892801/92‑1 (MQ=255)
                                                                                                              ataaAAAAATGAAATTCCTCTTTGACGGGCCAATAGCGATATTGGCCATTTTTTTAGCGCAACATTTGCGGCAAATTCCCTTCTCCATACAg                                                                                               >  4:892801/1‑92 (MQ=255)
                                                                                                               taaAAAAATGAAATTCCTCTTTGACGGGCCAATAGCGATATTGGCCATTTTTTTAGCGCAACATTTGCGGCAAATTCCCTTCTCCATa                                                                                                  >  1:188037/1‑88 (MQ=255)
                                                                                                               taaAAAAATGAAATTCCTCTTTGACGGGCCAATAGCGATATTGGCCATTTTTTTAGCGCAACATTTGCGGCAAATTCCCTTCTCCATa                                                                                                  <  2:188037/88‑1 (MQ=255)
                                                                                                               taaAAAAATGAAATTCCTCTTTGACGGGCCAATAGCGATATTGGCCATTTTTTTAGCGCAACATTTGCGGCAAATTCCCTTCTCCATACAGGTGTAGTGCACCGACCGCGACCACATATCGc                                                                <  1:379809/122‑1 (MQ=255)
                                                                                                               taaAAAAATGAAATTCCTCTTTGACGGGCCAATAGCGATATTGGCCATTTTTTTAGCGCAACATTTGCGGCAAATTCCCTTCTCCATACAGGTGTAGTGCACCGACCGCGACCACATATCGc                                                                >  2:379809/1‑122 (MQ=255)
                                                                                                               taaAAAAATGAAATTCCTCTTTGACGGGCCAATAGCGATATTGGCCATTTTTTTAGCGCAACATTTGCGGCAAATTCCCTTCTCCATACAGGTGTAGTGCACCGACCGCGACCACATATCGCCCCGGCGGCATGGCGCGTAATTTATcc                                     <  4:802159/149‑1 (MQ=255)
                                                                                                                 aaaaaaTGAAATTCCTCTTTGACGGGCCAATAGCGATATTGGCCATTTTTTTAGCGCAACATTTGCGGCaa                                                                                                                 >  1:794935/1‑71 (MQ=255)
                                                                                                                 aaaaaaTGAAATTCCTCTTTGACGGGCCAATAGCGATATTGGCCATTTTTTTAGCGCAACATTTGCGGCaa                                                                                                                 <  2:794935/71‑1 (MQ=255)
                                                                                                                  aaaaaTGAAATTCCTCTTTGACGGGCCAATAGCGATATTGGCCATTTTTTTAGCGCAACATTTGCGGCAAATTCCCTTCTCCATACAGGTGTAGTGCACCGACCGCGACCACATATCGCCCCGGCGGCATg                                                    >  4:824437/1‑131 (MQ=255)
                                                                                                                  aaaaaTGAAATTCCTCTTTGACGGGCCAATAGCGATATTGGCCATTTTTTTAGCGCAACATTTGCGGCAAATTCCCTTCTCCATACAGGTGTAGTGCACCGACCGCGACCACATATCGCCCCGGCGGCATg                                                    <  3:824437/131‑1 (MQ=255)
                                                                                                                  aaaaaTGAAATTCCTCTTTGACGGGCCAATAGCGATATTGGCCATTTTTTTAGCGCAACATTTGCGGCAAATTCCCTTCTCCATACAGGTGTAGTGCACCGACCGCGACCACATATCGCCCCGGCGGCATGGCGCGTAATTTATCCCGc                                  >  3:1249495/1‑149 (MQ=255)
                                                                                                                      aTGAAATTCCTCTTTGACGGGCCAATAGCGATATTGGCCATTTTTTTAGCGCAACATTTGCGGCAAATTCCCTTCTCCATACAGGTGTAGTGCACCGACCGCGACCACATATCGCCCCGGCGGCATGGCGCGTAATTTATCCCGCCAgg                              >  3:1088802/1‑149 (MQ=255)
                                                                                                                        gAAATTCCTCTTTGACGGGCCAATAGCGATATTGGCCATTTTTTTAGCGCAACATTTGCGGCAAATTCCCTTCTCCATACAGGTGTAGTGCACCGACCGCGACCACATATCGCCCCGGCGGCATGgcgc                                                >  2:420378/1‑129 (MQ=255)
                                                                                                                        gAAATTCCTCTTTGACGGGCCAATAGCGATATTGGCCATTTTTTTAGCGCAACATTTGCGGCAAATTCCCTTCTCCATACAGGTGTAGTGCACCGACCGCGACCACATATCGCCCCGGCGGCATGgcgc                                                <  1:420378/129‑1 (MQ=255)
                                                                                                                         aaaTTCCTCTTTGACGGGCCAATAGCGATATTGGCCATTTTTTTAGCGCAACATTTGCGGCAAATTCCCTTCTCCATACAGGTGTAGTGCACCGACCGCGACCACATATCGCCCCGGCGGCATGGCGCGTAATTTATCCCGCCAGGCga                           <  4:1249495/149‑1 (MQ=255)
                                                                                                                          aaTTCCTCTTTGACGGGCCAATAGCGATATTGGCCATTTTTTTAGCGCAACATTTGCGGCAAATTCCCTTCTCCATACAGGTGTAg                                                                                         <  1:491526/86‑1 (MQ=255)
                                                                                                                          aaTTCCTCTTTGACGGGCCAATAGCGATATTGGCCATTTTTTTAGCGCAACATTTGCGGCAAATTCCCTTCTCCATACAGGTGTAg                                                                                         >  2:491526/1‑86 (MQ=255)
                                                                                                                                tctTTGACGGGCCAATAGCGATATTGGCCATTTTTTTAGCGCAACATTTGCGGCAAATTCCCt                                                                                                          >  4:1160630/1‑63 (MQ=255)
                                                                                                                                tctTTGACGGGCCAATAGCGATATTGGCCATTTTTTTAGCGCAACATTTGCGGCAAATTCCCt                                                                                                          <  3:1160630/63‑1 (MQ=255)
                                                                                                                                tctTTGACGGGCCAATAGCGATATTGGCCATTTTTTTAGCGCAACATTTGCGGCAAATTCCCTTCTCCATa                                                                                                  <  2:1234848/71‑1 (MQ=255)
                                                                                                                                tctTTGACGGGCCAATAGCGATATTGGCCATTTTTTTAGCGCAACATTTGCGGCAAATTCCCTTCTCCATa                                                                                                  >  1:1234848/1‑71 (MQ=255)
                                                                                                                                  tttGACGGGCCAATAGCGATATTGGCCATTTTTTTAGCGCAACATTTGCGGCAAATTCCCTTCTCCATACAGGTGTAGTGCACCGACCGCGACCACATATCGCCCCGGCGGCATGGCGCGTAATTTATCCCGCCAGGCGAGATTTCGCt                  >  2:273236/1‑149 (MQ=255)
                                                                                                                                         ggCCAATATCGCTATTGGCCATTTTTTTAGCGCAACATTTGCGGCAAATTCCCTTCTCCATACAGGTGTAGTGCACCGACCGCGACCACATATCGCCCCGGCGGCAt                                                     <  1:507832/107‑1 (MQ=255)
                                                                                                                                         ggCCAATATCGCTATTGGCCATTTTTTTAGCGCAACATTTGCGGCAAATTCCCTTCTCCATACAGGTGTAGTGCACCGACCGCGACCACATATCGCCCCGGCGGCAt                                                     >  2:507832/1‑107 (MQ=255)
                                                                                                                                           ccAATAGCGATATTGGCCATTTTTTTAGCGCAACATTTGCGGCAAATTCCCTTCTCCATACAGGTGTAGTGCACCGACCGCGACCACATATCGCCCCGGCGGCATGGCGCGTAAt                                           <  3:1274672/115‑1 (MQ=255)
                                                                                                                                           ccAATAGCGATATTGGCCATTTTTTTAGCGCAACATTTGCGGCAAATTCCCTTCTCCATACAGGTGTAGTGCACCGACCGCGACCACATATCGCCCCGGCGGCATGGCGCGTAAt                                           >  4:1274672/1‑115 (MQ=255)
                                                                                                                                              aTAGCGATATTGGCCATTTTTTTAGCGCAACATTTGCGGCAAATTCCCTTCTCCATACAGGTGTAGTGCACCGACCGCGACCACATATCGCCCCGGCGGCATGGCGCGTAATTTATCTCGCCTGGCGGGAtaaa                     <  1:339075/134‑4 (MQ=255)
                                                                                                                                              aTAGCGATATTGGCCATTTTTTTAGCGCAACATTTGCGGCAAATTCCCTTCTCCATACAGGTGTAGTGCACCGACCGCGACCACATATCGCCCCGGCGGCATGGCGCGTAATTTATCTCGCCTGGCGGGAtaaa                     >  2:339075/1‑131 (MQ=255)
                                                                                                                                              aTAGCGATATTGGCCATTTTTTTAGCGCAACATTTGCGGCAAATTCCCTTCTCCATACAGGTGTAGTGCACCGACCGCGACCACATATCGCCCCGGCGGCATGGCGCGTAATTTATCCCGCCAGGCGAGATTTCGCTGATGCATCAGca      >  1:1055767/1‑149 (MQ=255)
                                                                                                                                                 gCGATATTGGCCATTTTTTTAGCGCAACATTTGCGGCAAATTCCCTTCTCCATACAGGTGTAGTGCACCGACCGCGACCACATATCGCCCCGGCGGCATGGCGCGTAATTTATCCCGCCAGGCGAGATTTCGCTGATGCATCAGCACAt   >  2:888843/1‑149 (MQ=255)
                                                                                                                                                  cGATATTGGCCATTTTTTTAGCGCAACATTTGCGGCAAATTCCCTTCTCCATACAGGTGTAGTGCACCGACCGCGACCACATATCGCCCCGGCGGCATGGCGCGTAATTTATCCCGCCAGGCgaga                         <  3:1065109/126‑1 (MQ=255)
                                                                                                                                                  cGATATTGGCCATTTTTTTAGCGCAACATTTGCGGCAAATTCCCTTCTCCATACAGGTGTAGTGCACCGACCGCGACCACATATCGCCCCGGCGGCATGGCGCGTAATTTATCCCGCCAGGCgaga                         >  4:1065109/1‑126 (MQ=255)
                                                                                                                                                  cGATATTGGCCATTTTTTTAGCGCAACATTTGCGGCAAATTCCCTTCTCCATACAGGTGTAGTGCACCGACCGCGACCACATATCGCCCCGGCGGCATGGCGCGTAATTTATCCCGCCAGGCGAGATTTCGCTGATGCATCAGCACATc  <  4:1088802/149‑1 (MQ=255)
                                                                                                                                                    |                                                                                                                                                  
ACGCCTGATGGCGGTCCAAAAAAAAGAGTCATCTTGCCTAAGAGTATTGGCAGGATGGTGAGATTGAGCGACAATCGAGTTACACCGTCGCTTAAAGTGACGGCATAATAATAAAAAAATGAAATTCCTCTTTGACGGGCCAATAGCGATATTGGCCATTTTTTTAGCGCAACATTTGCGGCAAATTCCCTTCTCCATACAGGTGTAGTGCACCGACCGCGACCACATATCGCCCCGGCGGCATGGCGCGTAATTTATCCCGCCAGGCGAGATTTCGCTGATGCATCAGCACATC  >  NC_000913/507123‑507417

Alignment Legend
Aligned base mismatch/match (shaded by quality score): ATCG/ATCG < 3 ≤ ATCG/ATCG < 27 ≤ ATCG/ATCG < 34 ≤ ATCG/ATCG < 39 ≤ ATCG/ATCG < 40 ≤ ATCG/ATCG
Unaligned base: atcg    Masked matching base: atcg    Alignment gap:     Deleted base: