Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 3loiA 5u93A 5u93B 3loiA 100 45 25 5u93A 29 100 99 5u93B 25 99 100 FOLD SIMILARITY (Z-SCORE) 3loiA 5u93A 5u93B 3loiA 31.5 0 4.7 5u93A 0 34.6 31.5 5u93B 4.7 31.5 34.9