Predicted mutation
evidence seq id position mutation annotation gene description
MC JC NC_000913 1,978,503 Δ776 bp insB‑5insA‑5 insB‑5, insA‑5

Missing coverage evidence...
   seq id start end size ←reads reads→ gene description
* * ÷ NC_000913 1978503–1979270 1979278 9–776 69 [0] [0] 67 insB‑5–insA‑5 insB‑5,insA‑5

New junction evidence
  seq id position reads (cov) reads (cov) score skew freq annotation gene product
* ? NC_000913 = 19785020 (0.000)62 (1.140) 42/260 0.2 100% intergenic (‑305/+16) flhD/insB‑5 DNA‑binding transcriptional dual regulator FlhD/IS1 protein InsB
?NC_000913 1979279 = 0 (0.000)intergenic (‑64/‑474) insA‑5/uspC IS1 protein InsA/universal stress protein C

GTCTTTACACTTATCTAAGATTTTTCCTAAATCGACGCAACTGTACTCGTCACTACACGCACATACAACGGAGGGGGGCTGCGATTTTCAATAATGCGTGATGCAGATCACACAAAACACTCAATTACTTAACATAAATGGGTAATGACTCCAACTTATTGATAGTGTTTTATGTTCAGATAATGCCCGATGACTTTGTCATGCAGCTCCACCGATTTTGAGAACGACAGCGACTTCCGTCCCAGCCGTGCCAGGTGCTGCCTCAGATTCAGGTTA  >  NC_000913/1978363‑1978638
                                                                                                                                           |                                                                                                                                        
gTCTTTACACTTATCTAAGATTTTTCCTAAATCGACGCAACTGTACTCGTCACTACACGCACATACAACGGAGGGGGGCTGCGATTTTCAATAATGCGTGATGCAGATCACACAAAACACTCAATTACTTAACATAAATG                                                                                                                                          >  2:305908‑M1/1‑140 (MQ=255)
gTCTTTACACTTATCTAAGATTTTTCCTAAATCGACGCAACTGTACTCGTCACTACACGCACATACAACGGAGGGGGGCTGCGATTTTCAATAATGCGTGATGCAGATCACACAAAACACTCAATTACTTAACATAAATG                                                                                                                                          >  1:399618‑M1/1‑140 (MQ=255)
    ttACACTTATCTAAGATTTTTCCTAAATCGACGCAACTGTACTCGTCACTACACGCACATACAACGGAGGGGGGCTGCGATTTTCAATAATGCGTGATGCAGATCACACAAAACACTCAATTACTTAACATAAATGtata                                                                                                                                      >  2:244668‑M1/1‑136 (MQ=255)
           tATCTAAGATTTTTCCTAAATCGACGCAACTGTACTCGTCACTACACGCACATACAACGGAGGGGGGCTGCGATTTTCAATAATGCGTGATGCAGATCACACAAAACACTCAATTACTTAACATAAATGtataagtcata                                                                                                                               >  2:244018‑M1/1‑129 (MQ=255)
            aTCTAAGATTTTTCCTAAATCGACGCAACTGTACTCGTCACTACACGCACATACAACGGAGGGGGGCTGCGATTTTCAATAATGCGTGATGCAGATCACACAAAACACTCAATTACTTAACATAAATGtataagtcatac                                                                                                                              >  2:69654‑M1/1‑128 (MQ=255)
            aTCTAAGATTTTTCCTAAATCGACGCAACTGTACTCGTCACTACACGCACATACAACGGAGGGGGGCTGCGATTTTCAATAATGCGTGATGCAGATCACACAAAACACTCAATTACTTAACATAAATGtataagtcatac                                                                                                                              >  2:247516‑M1/1‑128 (MQ=255)
            aTCTAAGATTTTTCCTAAATCGACGCAACTGTACTCGTCACTACACGCACATACAACGGAGGGGGGCTGCGATTTTCAATAATGCGTGATGCAGATCACACAAAACACTCAATTACTTAACATAAATGtataagtcatac                                                                                                                              >  2:252454‑M1/1‑128 (MQ=255)
            aTCTAAGATTTTTCCTAAATCGACGCAACTGTACTCGTCACTACACGCACATACAACGGAGGGGGGCTGCGATTTTCAATAATGCGTGATGCAGATCACACAAAACACTCAATTACTTAACATAAATGtataagtcatac                                                                                                                              >  1:30510‑M1/1‑128 (MQ=255)
             tCTAAGATTTTTCCTAAATCGACGCAACTGTACTCGTCACTACACGCACATACAACGGAGGGGGGCTGCGATTTTCAATAATGCGTGATGCAGATCACACAAAACACTCAATTACTTAACATAAATGtataagtcatact                                                                                                                             <  1:553260‑M1/140‑14 (MQ=255)
                    tttttCCTAAATCGACGCAACTGTACTCGTCACTACACGCACATACAACGGAGGGGGGCTGCGATTTTCAATAATGCGTGATGCAGATCACACAAAACACTCAATTACTTAACATAAATGtataagtcatacttttgttt                                                                                                                      <  1:247516‑M1/140‑21 (MQ=255)
                     ttttCCTAAATCGACGCAACTGTACTCGTCACTACACGCACATACAACGGAGGGGGGCTGCGATTTTCAATAATGCGTGATGCAGATCACACAAAACACTCAATTACTTAACATAAATGtataagtcatacttttgtttt                                                                                                                     <  2:100286‑M1/140‑22 (MQ=255)
                     ttttCCTAAATCGACGCAACTGTACTCGTCACTACACGCACATACAACGGAGGGGGGCTGCGATTTTCAATAATGCGTGATGCAGATCACACAAAACACTCAATTACTTAACATAAATGtataagtcatacttttgtttt                                                                                                                     <  1:244668‑M1/140‑22 (MQ=255)
                       ttCCTAAATCGACGCAACTGTACTCGTCACTACACGCACATACAACGGAGGGGGGCTGCGATTTTCAATAATGCGTGATGCAGATCACACAAAACACTCAATTACTTAACATAAATGtataagtcatacttttgttttgg                                                                                                                   >  2:489924‑M1/1‑117 (MQ=255)
                         ccTAAATCGACGCAACTGTACTCGTCACTACACGCACATACAACGGAGGGGGGCTGCGATTTTCAATAATGCGTGATGCAGATCACACAAAACACTCAATTACTTAACATAAATGtataagtcatacttttgttttgggt                                                                                                                 <  2:30510‑M1/140‑26 (MQ=255)
                          cTAAATCGACGCAACTGTACTCGTCACTACACGCACATACAACGGAGGGGGGCTGCGATTTTCAATAATGCGTGATGCAGATCACACAAAACACTCAATTACTTAACATAAATGtataagtcatacttttgttttgggtg                                                                                                                <  1:408704‑M1/140‑27 (MQ=255)
                                           tACTCGTCACTACACGCACATACAACGGAGGGGGGCTGCGATTTTCAATAATGCGTGATGCAGATCACACAAAACACTCAATTACTTAACATAAATGtataagtcatacttttgttttgggtgtatttcaatctgttaaa                                                                                               <  2:31547‑M1/140‑44 (MQ=255)
                                               cGTCACTACACGCACATACAACGGAGGGGGGCTGCGATTTTCAATAATGCGTGATGCAGATCACACAAAACACTCAATTACTTAACATAAATGtataagtcatacttttgttttgggtgtatttcaatctgttaaaaagt                                                                                           <  2:35958‑M1/140‑48 (MQ=255)
                                                gTCACTACACGCACATACAACGGAGGGGGGCTGCGATTTTCAATAATGCGTGATGCAGATCACACAAAACACTCAATTACTTAACATAAATGtataagtcatacttttgttttgggtgtatttcaatctgttaaaaagtt                                                                                          >  2:100390‑M1/1‑92 (MQ=255)
                                                     tACACGCACATACAACGGAGGGGGGCTGCGATTTTCAATAATGCGTGATGCAGATCACACAAAACACTCAATTACTTAACATAAATGtataagtcatacttttgttttgggtgtatttcaatctgttaaaaagtttttcg                                                                                     <  1:489924‑M1/140‑54 (MQ=255)
                                                     tACACGCACATACAACGGAGGGGGGCTGCGATTTTCAATAATGCGTGATGCAGATCACACAAAACACTCAATTACTTAACATAAATGtataagtcatacttttgttttgggtgtatttcaatctgttaaaaagtttttcg                                                                                     >  1:296989‑M1/1‑87 (MQ=255)
                                                        acGCACATACAACGGAGGGGGGCTGCGATTTTCAATAATGCGTGATGCAGATCACACAAAACACTCAATTACTTAACATAAATGtataagtcatacttttgttttgggtgtatttcaatctgttaaaaagtttttcgcta                                                                                  <  2:450546‑M1/140‑57 (MQ=255)
                                                            acaTACAACGGAGGGGGGCTGCGATTTTCAATAATGCGTGATGCAGATCACACAAAACACTCAATTACTTAACATAAATGtataagtcatacttttgttttgggtgtatttcaatctgttaaaaagtttttcgctacgct                                                                              >  1:839395‑M1/1‑80 (MQ=255)
                                                               tACAACGGAGGGGGGCTGCGATTTTCAATAATGCGTGATGCAGATCACACAAAACACTCAATTACTTAACATAAATGtataagtcatacttttgttttgggtgtatttcaatctgttaaaaagtttttcgctacgctagc                                                                           >  2:795945‑M1/1‑77 (MQ=255)
                                                                 cAACGGAGGGGGGCTGCGATTTTCAATAATGCGTGATGTAGATCACACAAAACACTCAATTACTTAACATAAATGtataagtcatacttttgttttgggtgtatttcaatctgttaaaaagtttttcgctacgctagcaa                                                                         >  1:130882‑M1/1‑75 (MQ=255)
                                                                    cGGAGGGGGGCTGCGATTTTCAATAATGCGTGATGCAGATCACACAAAACACTCAATTACTTAACATAAATGtataagtcatacttttgttttgggtgtatttcaatctgttaaaaagtttttcgctacgctagcaagca                                                                      >  1:646537‑M1/1‑72 (MQ=255)
                                                                      gAGGGGGGCTGCGATTTTCAATAATGCGTGATGCAGATCACACAAAACACTCAATTACTTAACATAAATGtataagtcatacttttgttttgggtgtatttcaatctgttaaaaagtttttcg                                                                                     <  1:733611‑M1/123‑54 (MQ=255)
                                                                      gAGGGGGGCTGCGATTTTCAATAATGCGTGATGCAGATCACACAAAACACTCAATTACTTAACATAAATGtataagtcatacttttgttttgggtgtatttcaatctgttaaaaagtttttcg                                                                                     >  2:733611‑M1/1‑70 (MQ=255)
                                                                        ggggggCTGCGATTTTCAATAATGCGTGATGCAGATCACACAAAACACTCAATTACTTAACATAAATGtataagtcatacttttgttttgggtgtatttcaatctgttaaaaagtttttcgctacgctagcaagcaaaaa                                                                  >  2:875159‑M1/1‑68 (MQ=255)
                                                                        ggggggCTGCGATTTTCAATAATGCGTGATGCAGATCACACAAAACACTCAATTACTTAACATAAATGtataagtcatacttttgttttgggtgtatttcaatctgttaaaaagtttttcgctacgctagcaagcaaaaa                                                                  >  2:356006‑M1/1‑68 (MQ=255)
                                                                        ggggggCTGCGATTTTCAATAATGCGTGATGCAGATCACACAAAACACTCAATTACTTAACATAAATGtataagtcatacttttgttttgggtgtatttcaatctgttaaaaagtttttcgctacgctagcaagcaaaaa                                                                  >  1:331763‑M1/1‑68 (MQ=255)
                                                                         gggggCTGCGATTTTCAATAATGCGTGATGCAGATCACACAAAACACTCAATTACTTAACATAAATGtataagtcatacttttgttttgggtgtatttcaatctgttaaaaagtttttcgatacgctagcaagcaaaaat                                                                 >  1:238371‑M1/1‑67 (MQ=255)
                                                                            ggCTGCGATTTTCAATAATGCGTGATGCAGATCACACAAAACACTCAATTACTTAACATAAATGtataagtcatacttttgttttgggtgtatttcaatctgttaaaaagtttttcgctacgctagcaagcaaaaatgaa                                                              >  2:623332‑M1/1‑64 (MQ=255)
                                                                              cTGCGATTTTCAATAATGCGTGATGCAGATCACACAAAACACTCAATTACTTAACATAAATGtataagtcatacttttgttttgggtgtatttcaatctgttaaaaagtttttcgctacgctagcaagcaaaaatgaaac                                                            >  1:895287‑M1/1‑62 (MQ=255)
                                                                              cTGCGATTTTCAATAATGCGTGATGCAGATCACACAAAACACTCAATTACTTAACATAAATGtataagtcatacttttgttttgggtgtatttcaatctgttaaaaagtttttcgctacgctagcaagcaaaaatgaaac                                                            >  1:648217‑M1/1‑62 (MQ=255)
                                                                                       tCAATAATGCGTGATGCAGATCACACAAAACACTCAATTACTTAACATAAATGtataagtcatacttttgttttgggtgtatttcaatctgttaaaaagtttttcgctacgctagcaagcaaaaatgaaacaggaataat                                                   <  2:399618‑M1/140‑88 (MQ=255)
                                                                                                cGTGATGCAGATCACACAAAACACTCAATTACTTAACATAAATGtataagtcatacttttgttttgggtgtatttcaatctgttaaaaagtttttcgctacgctagcaagcaaaaatgaaacaggaataatcgaaatggg                                          <  2:922938‑M1/140‑97 (MQ=255)
                                                                                                cGTGATGCAGATCACACAAAACACTCAATTACTTAACATAAATGtataagtcatacttttgttttgggtgtatttcaatctgttaaaaagtttttcgctacgctagcaagcaaaaatgaaacaggaataatcgaaatggg                                          <  1:244018‑M1/140‑97 (MQ=255)
                                                                                                cGTGATGCAGATCACACAAAACACTCAATTACTTAACATAAATGtataagtcatacttttgttttgggtgtatttcaatctgttaaaaagtttttcgctacgctagcaagcaaaaatgaaacagga                                                        >  1:820593‑M1/1‑44 (MQ=255)
                                                                                                cGTGATGCAGATCACACAAAACACTCAATTACTTAACATAAATGtataagtcatacttttgttttgggtgtatttcaatctgttaaaaagtttttcgctacgctagcaagcaaaaatgaaacagga                                                        <  2:820593‑M1/126‑83 (MQ=255)
                                                                                                cGTGATGCAGATCACACAAAACACTCAATTACTTAACATAAATGtataagtcatacttttgatttgggtgtatttcaatctgttaaaaagtttttcgctacgctagcaagcaaaaatgaaacaggaataatcgaaatggg                                          >  2:570993‑M1/1‑44 (MQ=255)
                                                                                                  tGATGCAGATCACACAAAACACTCAATTACTTAACATAAATGtataagtcatacttttgttttgggtgtatttcaatctgttaaaaagtttttcgctacgctagcaagcaaaaatgaaacaggaataatcgaaatgggat                                        >  2:787336‑M1/1‑42 (MQ=255)
                                                                                                  tGATGCAGATCACACAAAACACTCAATTACTTAACATAAATGtataagtcatacttttgttttgggtgtatttcaatctgttaaaaagtttttcgctacgctagcaagcaaaaatgaaacaggaataatcgaaatgggat                                        >  2:313803‑M1/1‑42 (MQ=255)
                                                                                                     tGCAGATCACACAAAACACTCAATTACTTAACATAAATGtataagtcatacttttgttttgggtgtatttcaatctgttaaaaagtttttcgctacgctagcaagcaaaaatgaaacaggaataatcgaaatgggatgtt                                     >  1:746040‑M1/1‑39 (MQ=255)
                                                                                                     tGCAGATCACACAAAACACTCAATTACTTAACATAAATGtataagtcatacttttgttttgggtgtatttcaatctgttaaaaagtttttcgctacgctagcaagcaaaaatgaaacaggaataatcgaaatgggatgtt                                     >  2:760986‑M1/1‑39 (MQ=255)
                                                                                                         gATCACACAAAACACTCAATTACTTAACATAAATGtataagtcatacttttgttttgggtgtatttcaatctgttaaaaagtttttcgctacgctagcaagcaaaaatgaaacaggaataatcgaaatgggatgttgcgc                                 <  1:760986‑M1/140‑106 (MQ=255)
                                                                                                         gATCACACAAAACACTCAATTACTTAACATAAATGtataagtcatacttttgttttgggtgtatttcaatctgttaaaaagtttttcgctacgctagcaagcaaaaatgaaacaggaataatcgaaatgggatgttgcgc                                 <  2:512499‑M1/140‑106 (MQ=255)
                                                                                                         gATCACACAAAACACTCAATTACTTAACATAAATGtataagtcatacttttgttttgggtgtatttcaatctgttaaaaagtttttcgctacgctagcaagcaaaaatgaaacaggaataatcgaaatgggatgttgcgc                                 >  1:512499‑M1/1‑35 (MQ=255)
                                                                                                          aTCACACAAAACACTCAATTACTTAACATAAATGtataagtcatacttttgttttgggtgtatttcaatctgttaaaaagtttttcgctacgctagcaagcaaaaatgaaacaggaataatcgaaatgggatgttgcgca                                <  1:787336‑M1/140‑107 (MQ=255)
                                                                                                          aTCACACAAAACACTCAATTACTTAACATAAATGtataagtcatacttttgttttgggtgtatttcaatctgttaaaaagtttttcgctacgctagcaagcaaaaatgaaacaggaataatcgaaatgggatgttgcgca                                <  2:296989‑M1/140‑107 (MQ=255)
                                                                                                          aTCACACAAAACACTCAATTACTTAACATAAATGtataagtcatacttttgttttgggtgtatttcaatctgttaaaaagtttttcgctacgctagcaagcaaaaatgaaacaggaataatcgaaatgggatgttgcgc                                 <  2:166740‑M1/139‑106 (MQ=255)
                                                                                                          aTCACACAAAACACTCAATTACTTAACATAAATGtataagtcatacttttgttttgggtgtatttcaatctgttaaaaagtttttcgctacgctagcaagcaaaaatgaaacaggaataatcgaaatgggatgttgcgc                                 >  1:166740‑M1/1‑34 (MQ=255)
                                                                                                            cacacaAAACACTCAATTACTTAACATAAATGtataagtcatacttttgttttgggtgtatttcaatctgttaaaaagtttttcgctacgctagcaagcaaaaatgaaacaggaataatcgaaatgggatgttgcgcaca                              <  2:217899‑M1/140‑109 (MQ=255)
                                                                                                              cacaAAACACTCAATTACTTAACATAAATGtataagtcatacttttgttttgggtgtatttcaatctgttaaaaagtttttcgctacgctagcaagcaaaaatgaaacaggaataatcgaaatgggatgttgcgcacagt                            <  2:646537‑M1/140‑111 (MQ=255)
                                                                                                               acaAAACACTCAATTACTTAACATAAATGtataagtcatacttttgttttgggtgtatttcaatctgttaaaaagtttttcgctacgctagcaagcaaaaatgaaacaggaataatcgaaatgggatgttgcgcacagtc                           >  2:448047‑M1/1‑29 (MQ=255)
                                                                                                               acaAAACACTCAATTACTTAACATAAATGtataagtcatacttttgttttgggtgtatttcaatctgttaaaaagtttttcgctacgctagcaagcaaaaatgaaacaggaataatcgaaatgggatgttgcgcacagtc                           >  1:581850‑M1/1‑29 (MQ=255)
                                                                                                                        tCAATTACTTAACATAAATGtataagtcatacttttgttttgggtgtatttcaatctgttaaaaagtttttcgctacgctagcaagcaaaaatgaaacaggaataatcgaaatgggatgttgcgcacagtcaaaataact                  >  1:551232‑M1/1‑20 (MQ=255)
                                                                                                                        tCAATTACTTAACATAAATGtataagtcatacttttgttttgggtgtatttcaatctgttaaaaagtttttcgctacgctagcaagcaaaaatgaaacaggaataatcgaaatgggatgttgcgcacagtcaaaataact                  >  2:423023‑M1/1‑20 (MQ=255)
                                                                                                                        tCAATTACTTAACATAAATGtataagtcatacttttgttttgggtgtatttcaatctgttaaaaagtttttcgctacgctagcaagcaaaaatgaaacaggaataatcgaaatgggatgttgcgcacagtcaaaataact                  <  1:356006‑M1/140‑121 (MQ=255)
                                                                                                                        tCAATTACTTAACATAAATGtataagtcatacttttgttttgggtgtatttcaatctgttaaaaagtttttcgctacgctagcaagcaaaaatgaaacaggaataatcgaaatgggatgttgcgcacagtcaaaataact                  >  2:686897‑M1/1‑20 (MQ=255)
                                                                                                                          aaTTACTTAACATAAATGtataagtcatacttttgttttgggtgtatttcaatctgttaaaaagtttttcgctacgctagcaagcaaaaatgaaacaggaataatcgaaatgggatgttgcgcacagtcaaaataactca                <  2:391933‑M1/140‑123 (MQ=255)
                                                                                                                            ttACTTAACATAAATGtataagtcatacttttgttttgggtgtatttcaatctgttaaaaagtttttcgctacgctagcaagcaaaaatgaaacaggaataatcgaaatgggatgttgcgcacagtcaaaataactcacc              <  1:448047‑M1/140‑125 (MQ=255)
                                                                                                                               cTTAACATAAATGtataagtcatacttttgttttgggtgtatttcaatctgttaaaaagtttttcgctacgctagcaagcaaaaatgaaacaggaataatcgaaatgggatgttgcgcacagtcaaaataactcaccgta           >  2:106926‑M1/1‑13 (MQ=255)
                                                                                                                               cTTAACATAAATGtataagtcatacttttgttttgggtgtatttcaatctgttaaaaagtttttcgctacgctagcaagcaaaaatgaaacaggaataatcgaaatgggatgttgcgcacagt                            >  2:675201‑M1/1‑13 (MQ=255)
                                                                                                                               cTTAACATAAATGtataagtcatacttttgttttgggtgtatttcaatctgttaaaaagtttttcgctacgctagcaagcaaaaatgaaacaggaataatcgaaatgggatgttgcgcacagt                            <  1:675201‑M1/123‑111 (MQ=255)
                                                                                                                                    cATAAATGtataagtcatacttttgttttgggtgtatttcaatctgttaaaaagtttttcgctacgctagcaagcaaaaatgaaacaggaataatcgaaatgggatgttgcgcacagtcaaaataactcaccgtaaataa      >  2:337326‑M1/1‑8 (MQ=255)
                                                                                                                                    cATAAATGtataagtcatacttttgttttgggtgtatttcaatctgttaaaaagtttttcgctacgctagcaagcaaaaatgaaacaggaataatcgaaatgggatgttgcgcacagtcaaaataactcaccgtaaataa      >  1:157914‑M1/1‑8 (MQ=255)
                                                                                                                                        aaTGtataagtcatacttttgttttgggtgtatttcaatctgttaaaaagtttttcgctacgctagcaagcaaaaatgaaacaggaataatcgaaatgggatgttgcgcacagtcaaaataactcaccgtaaataatcat  <  1:693515‑M1/140‑137 (MQ=255)
                                                                                                                                        aaTGtataagtcatacttttgttttgggtgtatttcaatctgttaaaaagtttttcgctacgctagcaagcaaaaatgaaacaggaataatcgaaatgggatgttgcgcacagtcaaaataactcaccgtaaataatcat  <  1:337326‑M1/140‑137 (MQ=255)
                                                                                                                                        aaTGtataagtcatacttttgttttgggtgtatttcaatctgttaaaaagtttttcgctacgctagcaagcaaaaatgaaacaggaataatcgaaatgggatgttgcgcacagtcaaaataactcaccgtaaataatcat  <  1:305908‑M1/140‑137 (MQ=255)
                                                                                                                                           |                                                                                                                                        
GTCTTTACACTTATCTAAGATTTTTCCTAAATCGACGCAACTGTACTCGTCACTACACGCACATACAACGGAGGGGGGCTGCGATTTTCAATAATGCGTGATGCAGATCACACAAAACACTCAATTACTTAACATAAATGGGTAATGACTCCAACTTATTGATAGTGTTTTATGTTCAGATAATGCCCGATGACTTTGTCATGCAGCTCCACCGATTTTGAGAACGACAGCGACTTCCGTCCCAGCCGTGCCAGGTGCTGCCTCAGATTCAGGTTA  >  NC_000913/1978363‑1978638

Alignment Legend
Aligned base mismatch/match (shaded by quality score): ATCG/ATCG < 3 ≤ ATCG/ATCG < 27 ≤ ATCG/ATCG < 33 ≤ ATCG/ATCG < 37 ≤ ATCG/ATCG < 40 ≤ ATCG/ATCG
Unaligned base: atcg    Masked matching base: atcg    Alignment gap:     Deleted base: