NMRK1 (Nicotinamide Riboside Kinase 1): NMRK1 is an enzyme that catalyzes the phosphorylation of nicotinamide riboside to nicotinamide mononucleotide, a key step in the NAD+ biosynthesis pathway. NAD+ is essential for energy metabolism, DNA repair, and cellular signaling. NMRK1's role in NAD+ biosynthesis makes it important for maintaining cellular energy balance and genomic stability, with implications for aging, metabolic disorders, and diseases associated with NAD+ depletion....