Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 1iomA 4fx0A 4fx0B 1iomA 100 62 21 4fx0A 55 100 95 4fx0B 27 95 100 FOLD SIMILARITY (Z-SCORE) 1iomA 4fx0A 4fx0B 1iomA 65 0 0 4fx0A 0 23.8 20.5 4fx0B 0 20.5 25.8