這個基因編碼人類血液中最豐富的蛋白質。這種蛋白質在調節血漿膠體滲透壓中發揮作用，并作為一種載體蛋白，用于多種內源性分子，包括激素、脂肪酸、代謝物以及外源性藥物。此外，該蛋白具有廣泛的底物特異性和酯酶樣活性。編碼的前蛋白經蛋白質水解處理生成成熟蛋白。從這種蛋白質衍生的肽epi-x4是cxcr4趨化因子受體的內源性抑制劑。[由RefSeq提供，2016年7月]
This gene encodes the most abundant protein in human blood. This protein functions in the regulation of blood plasma colloid osmotic pressure and acts as a carrier protein for a wide range of endogenous molecules including hormones, fatty acids, and metabolites, as well as exogenous drugs. Additionally, this protein exhibits an esterase-like activity with broad substrate specificity. The encoded preproprotein is proteolytically processed to generate the mature protein. A peptide derived from this protein, EPI-X4, is an endogenous inhibitor of the CXCR4 chemokine receptor. [provided by RefSeq, Jul 2016]