Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 4myyA 4myyB 5jjeA 5jjeB 4myyA 100 92 16 2 4myyB 92 100 43 4 5jjeA 0 0 100 0 5jjeB 7 4 0 100 FOLD SIMILARITY (Z-SCORE) 4myyA 4myyB 5jjeA 5jjeB 4myyA 14.9 10.8 1 2.8 4myyB 10.8 15 0 3.9 5jjeA 0 0 41.5 0 5jjeB 2.8 3.4 1.7 12.8