Haonan Wang, Binbin Ke, Wenxi Wang, Jianghong Guo, Wang Ying, Shuangcheng Ma, Hong Jiang
Human fibrinogen, as a blood product of special origin, is relatively simple to prepare and purify. Therefore, completely isolating and removing the relevant impurity proteins is difficult. Further, which impurity protein components are present is not clear. In this study, human fibrinogen products from seven enterprises were collected from the market, and the presence of impurity proteins was confirmed by sodium dodecyl sulfate-polyacrylamide gel electrophoresis. Subsequently, the major 12 impurity proteins were identified and screened by in-gel enzymolysis mass spectrometry, and 7 major impurity proteins with different peptide coverage were identified by enzyme-linked immunosorbent assay, in agreement with the mass spectrometry results...
April 18, 2023: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences