Innovative Research's Rabbit Anti Rat PAI-1 Polyclonal Antiserum is a frozen liquid polyclonal antibody. It's whole serum, rich in IgG and IgM antibodies, targeting the specified antigen, and includes host antibodies, various immunoglobulins, and other serum proteins. Suitable for ELISA, Western blot, and Immunoprecipitation. Known for reliable, consistent performance.