Mouse CD79a (Igalpha chain) is a 47 kD type I integral membrane protein, known as mb-1 or Ig alpha. It forms a heterodimer with CD79b (Igbeta chain). The CD79a and CD79b heterodimers are associated with surface IgM to form the B-cell receptor (BCR) that is necessary for signal transduction via the BCR in mature B cells. CD79a may play a role in mediating the transport of IgM to the cell surface. Clone F11-172 antibody recognizes the 47 kD membrane glycoprotein present on B lymphocytes. Clone F11-172 antibody recognizes the 47 kD membrane glycoprotein present on B lymphocytes.