High Quality Antibodies Start from Antigens with Native Conformations. OriGene handles antigen preparation and provides its human protein collection for immunization. The antigen will be expressed in human HEK293T cell line and purified under native conditions with affinity chromatography to preserve native protein structures with genuine mammalian post-translational modifications. Antigens preserved protein native conformation consist of native epitopes, which result in antibodies with high specificity and reactivity. In comparison to peptide-derived antibodies, these antibodies provide exceptional performances for the immunoassays that are sensitive to protein conformation, such as immunofluorescence, immunoprecipitation, ELISA, antibody array, immunohisotchemistry and flow cytometry.