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. 2015 Feb 18;11(2):458–467. doi: 10.4161/21645515.2014.990856

Figure 4.

Figure 4.

High performance strong cation exchange chromatography of the h2E2 antibody before and after treatment with carboxypeptidase B. 100 μg of h2E2 antibody was injected, and eluted with a gradient of NaCl in MES buffer. Note the disappearance of peaks 1 and 2 after removal of the C-terminal lysine residues. These peaks represent h2E2 antibody molecules containing 1 or 2 lysine residues on the C-termini of the 2 heavy chains in the antibody (which, after removal of lysine by carboxypeptidase elute with the main peak labeled ‘0” eluting at approximately 11 minutes).