Sequence Similarity : Homologous sequences (>30%) SEQUENCE SIMILARITY (%) 4f4hA 4f4hB 5khaA 4f4hA 100 99 92 4f4hB 99 100 92 5khaA 92 92 100 FOLD SIMILARITY (Z-SCORE) 4f4hA 4f4hB 5khaA 4f4hA 61.4 58.6 47.2 4f4hB 58.6 61.7 47.3 5khaA 47.2 47.3 62.2