Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 1kblA 3ew1A 4z2oA 1kblA 100 17 47 3ew1A 41 100 67 4z2oA 67 67 100 FOLD SIMILARITY (Z-SCORE) 1kblA 3ew1A 4z2oA 1kblA 65.9 0 0 3ew1A 0 27.4 19.6 4z2oA 0 19.6 27