Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 3fsgA 5csiA 5csiB 3fsgA 100 0 0 5csiA 26 100 98 5csiB 26 98 100 FOLD SIMILARITY (Z-SCORE) 3fsgA 5csiA 5csiB 3fsgA 51.8 0 0 5csiA 0 20.3 18.7 5csiB 0 18.7 20.4