Sequence Similarity : Homologous sequences (>30%) SEQUENCE SIMILARITY (%) 2hhzA 4ybnA 4ybnB 2hhzA 100 48 57 4ybnA 45 100 96 4ybnB 46 96 100 FOLD SIMILARITY (Z-SCORE) 2hhzA 4ybnA 4ybnB 2hhzA 29.6 0 0 4ybnA 8.8 33 29 4ybnB 10.2 29 31.4