Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 3mxjA 3mxjB 5odnA 3mxjA 100 96 18 3mxjB 96 100 20 5odnA 20 16 100 FOLD SIMILARITY (Z-SCORE) 3mxjA 3mxjB 5odnA 3mxjA 41.1 37.7 0 3mxjB 37.7 42.2 0 5odnA 0 0 20.6