Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 1qbzA 1qbzB 1qbzC 2sivA 1qbzA 100 90 36 6 1qbzB 90 100 95 0 1qbzC 36 95 100 0 2sivA 8 3 8 100 FOLD SIMILARITY (Z-SCORE) 1qbzA 1qbzB 1qbzC 2sivA 1qbzA 14.6 13 9.3 3.8 1qbzB 13 15.6 14.1 1.8 1qbzC 9.9 14.1 15.8 1.7 2sivA 3.7 2.3 2.2 5.8