
Keywords: سولفور یا گوگرد; AA; amino acid; COG; Clusters of Orthologous Groups; COG1; 604 COGs distributed in both prokaryotes and eukaryotes; COG2; 456 COGs from 44 mesophilic species; Ke; the proportion of Group to Atom on the side-chains of AA in prokaryotic proteins; Kp; the pr