For Research Use Only. Not for Use in Diagnostic Procedures. This is an ON-DEMAND item which requires minimum order quantity and extended lead time. Please Contact Us for a quote. ELISA method for the measurement of IgM isotype auto antibodies targeted to protein C. Assay designed with highly purified human protein C, obtained with non-denaturing methods, for autoantibody immunocapture. These are then revealed with a goat antibody specific for IgM, micro fragments, and labeled with peroxidase.