Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 2qxxA 5mu3A 5mu3C 2qxxA 100 37 0 5mu3A 37 100 0 5mu3C 0 0 0 FOLD SIMILARITY (Z-SCORE) 2qxxA 5mu3A 5mu3C 2qxxA 34.9 0 0 5mu3A 0.1 28.9 0 5mu3C 0 0 0