Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 6ao5A 6ao5B 6bn1A 6bn1B 6ao5A 100 0 0 0 6ao5B 15 100 4 39 6bn1A 0 10 100 10 6bn1B 0 39 4 100 FOLD SIMILARITY (Z-SCORE) 6ao5A 6ao5B 6bn1A 6bn1B 6ao5A 45.8 0 0 0 6ao5B 2.8 12.3 3 8.1 6bn1A 5.6 3 7.5 4.2 6bn1B 4 8.1 3.7 11.4