In order to decode the transcriptional atlas of B cells in GIST, we re-examined our scRNA-seq profiles of 23,654 B cells and identified five distinct clusters of B cells: Naive_B_cells, Memory_B_cells, GC_B_cells, IgA_PCs and IgG_PCs (Figure 2E), through publicly available gene expression profiles 20. Here, CD79A is linked to gastrointestinal stromal tumor.