Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 5gplA 5x42A 5x42B 5gplA 100 88 0 5x42A 0 100 0 5x42B 6 0 100 FOLD SIMILARITY (Z-SCORE) 5gplA 5x42A 5x42B 5gplA 33.2 0 0 5x42A 0 38.1 0 5x42B 0.2 0 9