(A) Schematic diagram showing the route map for generating GFP-μm-expressing IgM or IgD KO cells from WT Ramos B cells by CRSPR/Cas9 method. (B) Flow cytometry results showing that the subpopulations of the mixed cells can be identified by gating for the expression of GFP and anti-IgD staining. (C and D) TD05+:TD05− (C) or Enh+:Enh− (D) bPHA results were measured by flow cytometry and analyzed by the gating strategy shown in (B). Data represent three independent experiments. bPHA, branched proximity hybridization assay; Enh, Enhancer; GFP, Green fluorescent protein; IgD, immunoglobulin D; IgM, immunoglobulin M; KO, knock-out; PE, phycoerythrin; WT, wild-type.