Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 3e7kB 4ekxA 4ekxC 3e7kB 100 0 0 4ekxA 0 100 99 4ekxC 0 99 100 FOLD SIMILARITY (Z-SCORE) 3e7kB 4ekxA 4ekxC 3e7kB 7.1 0 0 4ekxA 0 23.3 21.8 4ekxC 0 21.8 23