Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 4cjdA 4troA 5appA 4cjdA 100 49 0 4troA 3 100 0 5appA 64 47 100 FOLD SIMILARITY (Z-SCORE) 4cjdA 4troA 5appA 4cjdA 14.4 0 1.9 4troA 0 50.5 0 5appA 1.5 0 8.9