Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 3favA 3favB 3rklA 3favA 100 16 5 3favB 16 100 7 3rklA 20 18 100 FOLD SIMILARITY (Z-SCORE) 3favA 3favB 3rklA 3favA 13.6 8.9 3.7 3favB 8.9 14 5.6 3rklA 5 5.4 17