Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 2ch7A 2ch7B 4mt8A 4mt8B 2ch7A 100 0 0 0 2ch7B 0 0 0 0 4mt8A 33 33 100 95 4mt8B 31 31 95 100 FOLD SIMILARITY (Z-SCORE) 2ch7A 2ch7B 4mt8A 4mt8B 2ch7A 22.8 0 0 0 2ch7B 0 0 0 0 4mt8A 4.7 4.8 12.9 10 4mt8B 6.6 6.9 10 13.3