PATR-DPB1 antibody, B-LB antibody, B-LB2 antibody, B-LB21 antibody, BLB1 antibody, GSP-BLB1 antibody, DPB1 antibody, HLA-DP antibody, HLA-DP1B antibody, HLA-DPB antibody, major histocompatibility complex, class II, DP beta 1 antibody, Major histocompatibility complex class II beta chain BLB1 antibody, PATR-DPB1 antibody, BLB1 antibody, HLA-DPB1 antibody
背景
HLA-DPB belongs to the HLA class II beta chain paralogues. This class II molecule is a heterodimer consisting of an alpha (DPA) and a beta chain (DPB), both anchored in the membrane. It plays a central role in the immune system by presenting peptides derived from extracellular proteins. Class II molecules are expressed in antigen presenting cells (APC: B lymphocytes, dendritic cells, macrophages). The beta chain is approximately 26-28 kDa and its gene contains 6 exons. Exon one encodes the leader peptide, exons 2 and 3 encode the two extracellular domains, exon 4 encodes the transmembrane domain and exon 5 encodes the cytoplasmic tail. Within the DP molecule both the alpha chain and the beta chain contain the polymorphisms specifying the peptide binding specificities, resulting in up to 4 different molecules.