DYKDDDDK Peptide

Description

A fusion tag, called DYKDDDDK and consisting of eight amino acids Asp-Tyr-Lys-Asp-Asp-Asp-Asp-Lys including an enterokinase-cleavage site, was specifically designed for immunoaffinity chromatography. It allows elution under non-denaturing conditions. Several antibodies against this peptide have been developed. One antibody, denoted as M1, binds the peptide in the presence of bivalent metal cations, preferably Ca2+. Elution is effected by chelating agents. Another strategy is competitive elution with excess of free DYKDDDDK peptide.