Background：IgD, a member of the immunoglobulin （Ig） family, is expressed in naive B cells. It has 3 Ig-like domains and exists in a transmembrane and a soluble form. In general, IgD is not secreted and usually its expression is lost after the Ig isotype switch. After antigen binding, IgD signals through the CD79a/CD79b （Iga/Igb） heterodimer, resulting in the activation of the B cell.
仕様
Synonyms：Immunoglobulin heavy constant delta,IGHD,Ig delta chain C region
