Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 3mb2B 4ct0A 4ct0B 3mb2B 100 0 0 4ct0A 4 100 0 4ct0B 0 21 100 FOLD SIMILARITY (Z-SCORE) 3mb2B 4ct0A 4ct0B 3mb2B 11.7 0 0 4ct0A 0 61.8 0 4ct0B 0 0 10.8