Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 4gdxA 4gdxB 4kt5A 4kt5B 4gdxA 100 47 40 43 4gdxB 39 100 0 0 4kt5A 40 0 100 97 4kt5B 40 0 97 100 FOLD SIMILARITY (Z-SCORE) 4gdxA 4gdxB 4kt5A 4kt5B 4gdxA 49.8 0.1 0 0 4gdxB 0 31.9 0 0 4kt5A 0 0 26.2 21 4kt5B 0 0 21 26