Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 1zlaG 1zlaH 4oqjA 1zlaG 100 26 63 1zlaH 28 100 55 4oqjA 0 0 100 FOLD SIMILARITY (Z-SCORE) 1zlaG 1zlaH 4oqjA 1zlaG 17.3 6.1 0 1zlaH 5.1 17.2 0 4oqjA 0 0 74.9