lacks_plasma_membrane_part has plasma membrane part in taxon follicular B cell Bm1 B cell These cells are also reportedly CD10-negative, CD39-positive, CD44-positive, CD71-negative, CD77-negative, IgM-positive, IgG-negative, IgA-negative, and IgE-negative. Bm1 B-lymphocyte A follicular B cell that is IgD-positive, CD23-negative, and CD38-negative. This naive cell type is activated in the extrafollicular areas through interaction with interdigitating dendritic cells and antigen-specific CD4-positive T cells. Bm1 B lymphocyte Bm1 B-cell IgD immunoglobulin complex Homo sapiens ADP-ribosyl cyclase/cyclic ADP-ribose hydrolase 1 low affinity immunoglobulin epsilon Fc receptor