A precursor B cell that is CD45R-positive, CD43-positive, CD24-positive, and BP-positive. Intracellularly expression of surrogate light chain, Rag1 and Rag2, TdT, occurs while there is no expression of mu heavy chain. [ GOC:tfm http://www.ncbi.nlm.nih.gov/pubmed/17582343 ]

This is just here as a test because I lose it