Amino acid replacement dependent on nucleotide replacement. The replacement goes from identical to incompatible (nucleotide replacement in bold). Abbreviations used here: Nucleotides: C: cytosine, A: adenine, G: guanine, T: thymine. Amino acids: V: valine (Val), I: isoleucine (Ile), L: leucine (Leu), F: phenylalanine (Phe), D: aspartic acid (Asp), E: glutamic acid (Glu), Q: glutamine (Gln), R: arginine (Arg), K: lysine (Lys), S: serine (Ser), P: proline (Pro), C: cysteine (Cys), Y: tyrosine (Tyr). Sbjct: Subject.