Serum
"Using the Kinetic Exclusion Assay (KinExA) technology, here we describe a method that overcomes the requirement for large amounts of purified and known quantities of antigen."
Rathanaswami P., et al. 2011. Kinetic analysis of unpurified native antigens available in very low quantities and concentrations. Anal Biochem 414: 7-13. http://www.ncbi.nlm.nih.gov/pubmed/21371417
Rathanaswami P., et al. 2011. Kinetic analysis of unpurified native antigens available in very low quantities and concentrations. Anal Biochem 414: 7-13. http://www.ncbi.nlm.nih.gov/pubmed/21371417