Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 3mb2A 4bcuA 4e6kA 5efvA 3mb2A 100 0 0 0 4bcuA 0 100 0 63 4e6kA 0 0 100 0 5efvA 0 68 29 100 FOLD SIMILARITY (Z-SCORE) 3mb2A 4bcuA 4e6kA 5efvA 3mb2A 12.1 0 0 0 4bcuA 0 34.7 0 0 4e6kA 0 0 30.8 0 5efvA 0 0.1 0.9 54