A germinal center B cell that is rapidly dividing and has the phenotype IgD-negative, CD38-positive, and CD77-positive. Somatic hypermutation of the immunoglobulin V gene region can occur during proliferation of this cell type. [ GOC:dsd http://www.ncbi.nlm.nih.gov/pubmed/8006591 http://www.ncbi.nlm.nih.gov/pubmed/18432934 GOC:msz http://purl.obolibrary.org/obo/go/references/0000031 ]

Synonyms: Bm3 B-lymphocyte Bm3 B-cell Bm3 B lymphocyte