Sequence Similarity : Homologous sequences (>30%) SEQUENCE SIMILARITY (%) 3npiA 3npiB 4jzxA 3npiA 100 99 96 3npiB 99 100 96 4jzxA 52 51 100 FOLD SIMILARITY (Z-SCORE) 3npiA 3npiB 4jzxA 3npiA 34.6 32.5 2 3npiB 32.5 34.6 2 4jzxA 0 0 61.5