Sequence Similarity : Homologous sequences (>30%) SEQUENCE SIMILARITY (%) 1q50A 2o2cA 4qfhA 1q50A 100 94 90 2o2cA 94 100 91 4qfhA 90 91 100 FOLD SIMILARITY (Z-SCORE) 1q50A 2o2cA 4qfhA 1q50A 71.3 58.5 58.6 2o2cA 58.5 66.7 62.6 4qfhA 58.6 62.6 66.9