Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 3craA 3craB 9paiA 9paiB 3craA 100 96 0 0 3craB 96 100 39 0 9paiA 0 0 100 0 9paiB 0 0 0 100 FOLD SIMILARITY (Z-SCORE) 3craA 3craB 9paiA 9paiB 3craA 27.5 16.5 0 0 3craB 16.6 24.8 0 0 9paiA 0 0 57.9 0 9paiB 0 0 0 5.2