Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 5h66A 5h66B 5xs9A 5xs9B 5h66A 100 46 100 97 5h66B 60 100 0 0 5xs9A 38 0 100 99 5xs9B 53 0 99 100 FOLD SIMILARITY (Z-SCORE) 5h66A 5h66B 5xs9A 5xs9B 5h66A 27.2 0 0 0 5h66B 0 26.8 0 0 5xs9A 0 0 33.4 30.6 5xs9B 0 0 30.6 33.1