0 0 votes Enzyme-linked immunosorbent assay (ELISA) is used for quantifying antibody levels in blood determining the molecular weight of an antigen purifying proteins from biological fluids determining the molecular weight of an antibody Immunology gate2017 immunology analytical-techniques biochemistry + – Milicevic3306 7.9k points answer comment Share Follow 0 reply Please log in or register to add a comment.