Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 5u1aA 5u1aB 5u1aD 6d42A 5u1aA 100 99 99 0 5u1aB 99 100 99 0 5u1aD 99 99 100 0 6d42A 0 0 0 100 FOLD SIMILARITY (Z-SCORE) 5u1aA 5u1aB 5u1aD 6d42A 5u1aA 32 30.3 30.1 0 5u1aB 30.3 31.7 29.9 0 5u1aD 30.1 29.9 32 0 6d42A 0.4 0.4 0.5 6