Consequently, we analyzed EBV-infected B cells from White IgAN patients, Whites with other renal diseases, and White and African American healthy controls for cell-surface (s) Ig isotypes, production of Gd-IgA1 after polyclonal stimulation, and expression of receptors involved in selective homing to various mucosal or systemic lymphoid tissues (71). This evidence concerns the gene IGHA1 and kidney disorder.