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Table 1 Differences in number of nucleotide and amino acid compositions, synonymous and nonsynonymous nucleotide substitutions, and predicted antigenic epitopes between sub-clade 2.2.1.-2.2.2. Swedish H5N1 avian influenza viruses.

From: Molecular characterization of highly pathogenic H5N1 avian influenza viruses isolated in Sweden in 2006

Gene Region of comparison/nucleotide/ Difference between sub-clade 2.2.1.-2.2.2. Swedish viruses Number of synonymous/nonsynonymous nucleotide changes Average number of predicted antigenic epitopes
   Average number of nucleotide differences Average number of amino acid differences 2.2.1. 2.2.2. 2.2.1. 2.2.2.
PB2 73–2193 23.7 4.5 0/1 6/4 32 32
PB1 22–2199 20.1 6.9 6/3 10/4 Nd Nd
   PB1-F2: 1.1 1.1 0/0 0/1   
PA 60–2091 13 3.2 1/0 3/2 28 28
HA 49–1636 15.5 1.5 1/2 5/5 22.5 22
NP 1–1497 16.1 6.2 2/5 8/10 15 15.1
NA 1–1344 14.8 8.6 10/6 9/13 19.5 17.8
MP MP1: 1–950 12 4.2 3/2 9/14 Nd Nd
  MP2: 1–262 5.3 2.9 0/2 4/6   
NS NS1: 1–678 9.3 3.7 1/1 8/14   
  NS2: 1–366 6.8 3.5 1/1 9/11 Nd Nd
  1. Nd: Not done