Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 2r9rB 3e86A 3or7C 2r9rB 100 19 31 3e86A 24 100 43 3or7C 32 44 100 FOLD SIMILARITY (Z-SCORE) 2r9rB 3e86A 3or7C 2r9rB 42.4 5.6 12.8 3e86A 6.4 18.8 8.7 3or7C 12.9 8.9 20.1