Fig. 4

Hot spot map of amino acid variations of Porphyrobacter cryptus. Amino acids located on the vertical axis represent substituting amino acids, whereas amino acids lying on the horizontal axis are substituted amino acids. A, alanine; C, cysteine; D, aspartic acid; E, glutamic acid; F, phenylalanine; G, glycine; H, histidine; I, isoleucine; K, lysine; L, lysine; M, methionine; N, asparagine; P, proline; Q, glutamine; R, arginine; S, serine; T, threonine; V, valine; W tryptophan; Y tyrosine