2.7.1.22 ATP + 1-(beta-D-ribofuranosyl)-nicotinamide = ADP + beta-nicotinamide D-ribonucleotide bifunctional enzyme exhibiting nicotinamide ribose kinase activity, EC 2.7.1.22, and weak adenylyltransferase activity, EC 2.7.7.1 659066 2.7.1.22 ATP + 1-(beta-D-ribofuranosyl)-nicotinamide = ADP + beta-nicotinamide D-ribonucleotide enzyme has both ribosylnicotinamide kinase, i.e. EC 2.7.1.22, and nicotinamide mononucleotide adenylyltransferase, i.e. EC 2.7.7.18, activity 641175