A germinal center B cell that develops from a Bm3 B cell. This cell has the phenotype IgM-negative, IgD-positive, and CD38-positive. [ GOC:msz GOC:add GOC:tfm http://purl.obolibrary.org/obo/go/references/0000031 http://www.ncbi.nlm.nih.gov/pubmed/9280752 ]

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