Sequence Similarity : Homologous sequences (>30%) SEQUENCE SIMILARITY (%) 3robA 3robB 4gdxA 4gdxB 3robA 100 98 72 57 3robB 98 100 70 57 4gdxA 72 70 100 47 4gdxB 75 71 39 100 FOLD SIMILARITY (Z-SCORE) 3robA 3robB 4gdxA 4gdxB 3robA 27.5 25.2 0 0 3robB 25.2 27.6 0 0 4gdxA 0 0 49.8 0.1 4gdxB 0 0 0 31.9