Sequence Similarity : Homologous sequences (>30%) SEQUENCE SIMILARITY (%) 4cy8A 5c6uA 4cy8A 100 58 5c6uA 58 100 FOLD SIMILARITY (Z-SCORE) 4cy8A 5c6uA 4cy8A 65.4 0.3 5c6uA 0.3 68.1