Sequence Similarity : Non-homologous sequences (<30%) SEQUENCE SIMILARITY (%) 3fs8A 3hulA 3r8yA 4ihfD 3fs8A 100 71 100 89 3hulA 40 100 11 55 3r8yA 100 14 100 100 4ihfD 74 60 100 100 FOLD SIMILARITY (Z-SCORE) 3fs8A 3hulA 3r8yA 4ihfD 3fs8A 44.8 0 16.4 20.3 3hulA 0 49.8 3.3 0 3r8yA 15.8 3.3 32.5 11.4 4ihfD 27.3 0.2 15.6 45.8