Product Description: MC-Val-D-Cit-PAB-PNP is a cleavable peptide linker molecule used in the synthesis of antibody-drug conjugates (ADCs). MC-Val-D-Cit-PAB-PNP contains a maleimidocaproyl (Mc) group that can be conjugated to an antibody and a p-nitrophenol (PNP) group that allows the peptide to be linked to antitumor compounds.