GMPR protein plays a crucial role in nucleotide metabolism by catalyzing the irreversible NADPH-dependent deamination of to IMP. This enzymatic activity is pivotal for the conversion of nucleobase, nucleoside, and nucleotide derivatives of guanine (G) to adenine (A) nucleotides, contributing to the intricate network of biochemical processes involved in maintaining the essential intracellular balance between A and G nucleotides. GMPR Protein, Human (His) is the recombinant human-derived GMPR protein, expressed by E. coli , with N-His labeled tag.