Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 2y69A 2y69B 4q52A 4q52D 2y69A 100 0 0 0 2y69B 0 100 54 52 4q52A 0 56 100 94 4q52D 0 58 94 100 FOLD SIMILARITY (Z-SCORE) 2y69A 2y69B 4q52A 4q52D 2y69A 68.2 0 0 0 2y69B 0 33.1 3 2.9 4q52A 0 3 31.5 28 4q52D 0 3.3 28 29.9