https://doi.org/10.1351/goldbook.13595
Cell in the B-lymphocyte lineage that has rearranged heavy chain but not light chain genes; it expresses surrogate light chains and \(\upmu\) heavy chain at its surface in conjunction with immunoglobulins Ig _012643_ and Ig _012644_. All these molecules comprise the pre-B-cell receptor (pre-BCR).