Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 1pp9A 1pp9B 4y7sA 1pp9A 100 89 0 1pp9B 89 100 0 4y7sA 0 0 100 FOLD SIMILARITY (Z-SCORE) 1pp9A 1pp9B 4y7sA 1pp9A 65 43.9 0 1pp9B 43.9 67.2 0 4y7sA 0 0 26.6