Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 1zv8A 1zv8C 2beqA 1zv8A 100 7 6 1zv8C 7 100 11 2beqA 0 0 100 FOLD SIMILARITY (Z-SCORE) 1zv8A 1zv8C 2beqA 1zv8A 6.8 5.6 4.3 1zv8C 5.6 6.6 4.4 2beqA 4.3 4.4 5.8