highly significantp<0.0001
The difference between observed and expected distributions (both directions) was highly significant ( Chi 2 test, p<0.0001).
The difference between observed and expected distributions (both directions) was highly significant ( Chi 2 test, p<0.0001).
In addition, the 168 alvinellid-specific amino acid replacements found over this branch displayed a positive trend towards a greater hydrophobicity with a global loss of charged residues toward hydrophobic residues (67%) and a strong conversion of polar residues to hydrophobic ones (77%).
Replacements that are specific to alvinellids (not only positive sites) also indicated a clear trend of hydrophobicity increase in both the polar and hydrophobic categories.