Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 1o51A 3r8yA 3r8yB 1o51A 100 10 22 3r8yA 8 100 97 3r8yB 20 96 100 FOLD SIMILARITY (Z-SCORE) 1o51A 3r8yA 3r8yB 1o51A 20.6 5.3 0 3r8yA 5.3 32.5 30.1 3r8yB 5.5 30.1 34