Sequence Similarity : Homologous sequences (>30%) SEQUENCE SIMILARITY (%) 3nz2A 3nz2B 4ru4A 3nz2A 100 99 77 3nz2B 99 100 73 4ru4A 80 81 100 FOLD SIMILARITY (Z-SCORE) 3nz2A 3nz2B 4ru4A 3nz2A 36.1 33.6 1 3nz2B 33.6 36 1.9 4ru4A 4.6 4.7 73.9