| contribution of chinese pekin duck complement component c3d-p29 repeats to enhancement of th2-biased immune responses against ndv f gene induced by dna immunization. | c3d, a split product of c3, interacts with its receptor (cr2 or cd21) on b cells and follicular dendritic cells (fdcs) and is crucial for induction and maintenance of a normal humoral immune response. this fragment of complement protein c3 (c3d) has also been shown to enhance b cell responses when complexed with antigen and c3d fusion increased th2-biased immune response by inducing il-4 production. | 2010 | 20148704 |