Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 3cb0A 3cb0C 4be2A 3cb0A 100 98 0 3cb0C 98 100 18 4be2A 71 66 100 FOLD SIMILARITY (Z-SCORE) 3cb0A 3cb0C 4be2A 3cb0A 33.2 31.3 0 3cb0C 31.3 33.6 0.1 4be2A 0 0 47.1