Immunoglobulin iota chain is a protein that in humans is encoded by the VPREB1 gene. VPREB1 has also recently been designated CD179A (cluster of differentiation 179A).CD179a (VpreB) is a 126 aa-long polypeptide with apparent MW of 16-18 kDa. It is expressed selectively at the early stages of B cell development, namely, in proB and early preB cells.
