Sequence Similarity : Homologous sequences (>30%) SEQUENCE SIMILARITY (%) 1q50A 2cxnA 3nbuA 4qfhA 1q50A 100 90 91 90 2cxnA 90 100 91 89 3nbuA 91 91 100 89 4qfhA 90 89 89 100 FOLD SIMILARITY (Z-SCORE) 1q50A 2cxnA 3nbuA 4qfhA 1q50A 71.3 55.7 55.5 58.6 2cxnA 55.7 67.4 60.1 58.8 3nbuA 55.5 60.1 68 58.5 4qfhA 58.6 58.8 58.5 66.9