带3蛋白(band 3 protein,下简称“带3”)是红细胞膜主要蛋白质,占总膜蛋白量的25％,分子量约95,000,属于Zigzag蛋白,即嵌膜蛋白,每一单体至少穿膜7次以上。整个分子分为三个区域:胞浆区域、穿膜区域和外侧区域。含糖的肽链C端为外侧区域,具有细胞表面糖蛋白的一般 Band 3 protein (band 3) is the main protein of the erythrocyte membrane, accounting for 25% of the total membrane protein, molecular weight of about 95,000, belongs to the Zigzag protein, which is the embedded protein, each monomer at least through the membrane 7 times or more. The whole molecule is divided into three regions: the cytoplasm region, the transmembrane region and the lateral region. The C-terminus of the sugar chain is the outer region, with the general cell surface glycoprotein