Epitope mapping identifies antigen regions that serve as binding sites for antibodies. The overlapping linear peptides derived from the primary sequence of the antigen are frequently used for epitope screening. Individual peptides can be divided into several fragments that overlap. The resulting overlapping peptide libraries can then be used for processes including continuous and linear epitope mapping.<\/p>\n\n\n\n
For example, to map the epitope of an antibody, a few overlapping fragments spanning the target regions are constructed in an expression vector. These constructs are transiently transfected in cells and whole cell lysates collected after 48 hours are subjected to Western blotting with the antibody. To further map the region of this fragment, a series of overlapping peptides are synthesized. These peptides and lysates from the cells expressing the target full-length gene or empty vector (negative) are performed by the dot blot.<\/p>\n\n\n\n
Mapping epitopes quickly and accurately are challenging because the epitopes tend to be nonlinear on antigens. Combining binding specifically toward two distinct epitopes into a single molecule can significantly enhance the immunotherapeutic properties of monoclonal antibodies. Multivalent interactions are the most efficient at driving IgE receptor signaling pathways.<\/p>\n\n\n\n
There are several useful tools for studying antigen-antibody interactions.<\/p>\n\n\n\n
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Epitope mapping identifies antigen regions that serve as binding sites for antibodies. The overlapping linear peptides derived from the primary sequence of the antigen are frequently used for epitope screening. Individual peptides can be divided into several fragments that overlap. … Continue reading