Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 1pc6A 1szqA 3qzbA 1pc6A 100 57 14 1szqA 65 100 0 3qzbA 0 21 100 FOLD SIMILARITY (Z-SCORE) 1pc6A 1szqA 3qzbA 1pc6A 20.6 0.7 0 1szqA 0.2 67.6 0 3qzbA 0 0 26.1