Mouse anti-Human IgG1 Hinge antibody [4E3] (HRP) Cat. No. GTX03661 Cat. No. GTX03661 GTX03661 ELISA Image ELISA analysis of purified human IgG1, IgG2, IgG3, and IgG4 using serially diluted GTX03661 Mouse anti-Human IgG1 Hinge antibody [4E3] (HRP). See all Human IgG1 products