Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 3dtdC 3mayC 3mayD 3dtdC 100 0 0 3mayC 0 100 98 3mayD 7 98 100 FOLD SIMILARITY (Z-SCORE) 3dtdC 3mayC 3mayD 3dtdC 29.9 0 0 3mayC 0 19 12.5 3mayD 0.4 12.5 18.4