ELISA analysis of serially diluted GTX03791 Human IgA1 isotype control using Mouse Anti-Human IgG, Mouse Anti-Human IgM, Mouse Anti-Human IgAl, Mouse Anti-Human IgA2, Mouse Anti-Human IgD, Mouse Anti-Human IgE Fc, Mouse Anti-Human Kappa, and Mouse Anti-Human Lambda followed by Streptavidin-HRP and quantified.