Merck, MABC547, Anti-Poly ADP-ribose Antibody, clone 10H

Poly(ADP-ribose) polymerase is an abundant nuclear enzyme that catalyses the synthesis of poly(ADP-ribose) from nicotinamide adenine dinucleotide (NAD+). Poly(ADP-ribose) has an N-terminal DNA-binding domain containing two zinc-fingers, which is linked to the C-terminal NAD+-binding domain by a short region containing several glutamic acid residues that are sites of auto-poly (ADP-ribosyl) ation. Production of poly(ADP-ribose) within the cell is initiated by agents that generate DNA strand interruptions. The branched homopolymer chains may reach a length of 200–300 residues but are rapidly degraded after synthesis. The function of poly(ADP-ribose) synthesis is not clear, although it seems to be required for DNA repair.