Sequence Similarity : Homologous sequences (>30%) SEQUENCE SIMILARITY (%) 4h4gA 4h4gB 4i83A 4h4gA 100 99 77 4h4gB 99 100 75 4i83A 77 75 100 FOLD SIMILARITY (Z-SCORE) 4h4gA 4h4gB 4i83A 4h4gA 30.2 25.2 24.3 4h4gB 25.2 28.6 22.8 4i83A 24.3 22.8 31.7