早在1968年Beaggard等从肾脏病人的尿液中发现一种分子蛋白质,其分子量为11,800dal,其电泳图位于β_2带,故命名为β_2微球蛋白(β_2-MG)。近年来,经进一步研究,已知β_2—MG系100余种氨基酸的单体多肽组成的蛋白质。起源于人体间质、上皮细胞和造血系统的正常细胞。恶性细取也能合成。它广泛存在于血清、脑脊液、羊 As early as 1968, Beaggard et al. Found a molecular protein from the urine of kidney patients with a molecular weight of 11,800 dal and its electropherogram located in the β_2 band, hence the name β_2-MG. In recent years, further studies have shown that β 2-MG is a protein consisting of more than 100 amino acid monomeric polypeptides. Originated in the human body stroma, epithelial cells and hematopoietic normal cells. Malicious fine can also synthesis. It is widespread in serum, cerebrospinal fluid, sheep