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Table 1 Distances between genes of A/California/04/2009 (H1N1) and those of the closest H1N2 isolates.

From: From where did the 2009 'swine-origin' influenza A virus (H1N1) emerge?

  PB21 PB1 PA HA NP NS3
A/swine/Indiana/P12439/2000 0.0368*2 0.0430 0.0474 0.0525 0.0360* 0.0533
A/swine/Indiana/9K035/1999 0.0406 0.0395* 0.0498 0.0513* 0.0387 0.0439
A/swine/Minnesota/55551/2000 0.0372 0.0451 0.0450* 0.1224 0.0408 0.0427*
A/swine/Illinois/100084/2001 0.0446 0.0434 0.0451 0.0597 0.0404 0.0528
A/swine/Illinois/100085A/2001 0.0453 0.0420 0.0486 0.0578 0.0404 0.0539
  1. 1 Genes: PB2, PB1 and PA, polymerase genes; HA, haemagglutinin; NP, nucleoprotein; NS, non-structural proteins 1 and 2
  2. 2 Patristic distances; nucleotide substitutions/site. The isolate that gave the shortest distance for each gene is marked with an asterisk.
  3. 3 All five NS1 genes encode a slightly truncated (219 amino acids) NS1 protein as does the NS1 gene of S-OIV.