CD19 is a lymphocyte cell surface molecule that functions as a general response regulator or rheostat, which defnes signalling thresholds. These responses are infuenced by signals transduced through a CD19-CD21 cell surface receptor complex, where the binding of complement C3d to CD21 links humoral immune responses with the innate immune system. The CD19-CD21 complex is composed of at least four non-covalently associated proteins: CD19, CD21(complement receptor 2),CD81 and CD225.
Ross, TM, Toapanta, FR
Rickert, RC, Kolla, RV, Del Nagro, CJ, Anzelon, AN, Otero, DC, Omori, SA
Barrington, RA, Carter, RH
© 2023 Reactome
