Mouse anti-Human IgG4 pFc' antibody [HP6023] (HRP) Cat. No. GTX03663 Cat. No. GTX03663 GTX03663 ELISA Image ELISA analysis of purified human IgG1, IgG2, IgG3, and IgG4 using serially diluted GTX03663 Mouse anti-Human IgG4 pFc' antibody [HP6023] (HRP). See all Human IgG3 products