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. 2012 Aug 8;14(4):R116. doi: 10.1186/bcr3240

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Copyright ©2012 Fan et al.; licensee BioMed Central Ltd.

This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Detection of trastuzumab proteolytic cleavage in vitro. (A) Capillary electropherograms (CEs) of trastuzumab and matrix metalloproteinase (MMP)-digested trastuzumab under nonreducing and denatured running conditions. (B) CE of trastuzumab and IgG-degrading enzyme S (IdeS)-digested single hinge cleaved trastuzumab (scIgG-T). (C) Purified scIgG-T under nonreducing and denaturing running conditions and stained with Coomassie blue. (D) Trastuzumab and scIgG-T under reducing and denaturing running conditions and stained with Coomassie blue. Fab, fragment antigen binding; Fc_(m), Fc monomer; HC, heavy chain; LC, light chain.