Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 1n7hA 1n7hB 2ovlA 3cuoA 4d3dA 1n7hA 100 99 76 17 64 1n7hB 99 100 78 17 64 2ovlA 100 81 100 15 70 3cuoA 16 16 35 100 23 4d3dA 62 62 79 24 100 FOLD SIMILARITY (Z-SCORE) 1n7hA 1n7hB 2ovlA 3cuoA 4d3dA 1n7hA 58.8 57.5 1.9 0 4.5 1n7hB 57.5 59.2 2.1 0 4.4 2ovlA 1.5 0.1 66.3 0 2.8 3cuoA 0 0 0 21.1 0 4d3dA 5.4 5.5 1.2 0 40.5