Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 3tuoA 3tuoD 5a0jA 3tuoA 100 87 0 3tuoD 87 100 0 5a0jA 0 0 100 FOLD SIMILARITY (Z-SCORE) 3tuoA 3tuoD 5a0jA 3tuoA 23.1 16.6 0 3tuoD 16.6 22.2 0 5a0jA 0 0 55.6