Figure 5From: Identification and molecular characterization of a novel flavin-free NADPH preferred azoreductase encoded by azoB in Pigmentiphaga kullae K24Structural representation of P. kullae K24 AzoB for dinucleotide binding. A, shows cartoon structure of AzoB, in which the key residues for NADPH binding are colored. B, in the AzoB-NADPH complex, there is a wide exposed cleft adjacent to the nicotinamide moiety. C, the alignment of the glycine-rich pyrophosphate-binding sequences from the enzymes studied. The secondary structure assignment is based on the AzoB. The residues related to NADPH binding are boxed.Back to article page