Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 3mtuA 3zrxA 3zrxB 4mt8A 4mt8B 5b1nA 3mtuA 100 5 5 6 6 0 3zrxA 8 100 99 43 33 0 3zrxB 8 99 100 41 36 0 4mt8A 5 32 29 100 95 12 4mt8B 8 35 42 95 100 7 5b1nA 0 29 29 4 7 100 FOLD SIMILARITY (Z-SCORE) 3mtuA 3zrxA 3zrxB 4mt8A 4mt8B 5b1nA 3mtuA 10.7 3.1 3.4 4.9 4.6 1.4 3zrxA 4.8 16.3 12.1 5.8 5.6 0 3zrxB 4.5 12.1 15.5 5.7 5 0 4mt8A 4.1 3.8 3.6 12.9 10 5.6 4mt8B 4.5 5.5 4 10 13.3 5.5 5b1nA 1.5 9.7 8.4 6.1 5.5 12