Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 1uheA 1uheB 5gmlB 1uheA 100 0 0 1uheB 0 0 0 5gmlB 0 0 0 FOLD SIMILARITY (Z-SCORE) 1uheA 1uheB 5gmlB 1uheA 21.2 0 0 1uheB 0 0 0 5gmlB 0 0 0