Sequence Similarity : Homologous sequences (>30%) SEQUENCE SIMILARITY (%) 2xhzA 2xhzB 5xdcA 2xhzA 100 99 81 2xhzB 99 100 71 5xdcA 55 46 100 FOLD SIMILARITY (Z-SCORE) 2xhzA 2xhzB 5xdcA 2xhzA 35.6 33.1 0 2xhzB 33.1 35.7 0 5xdcA 0 0 73.5