糖蛋白激素α亚基 糖蛋白激素α亚基英語Alpha subunit of glycoprotein hormones或称为绒毛膜促性腺激素α亚基Glycoprotein hormones alpha chain是一个由人类基因CGA 编码的蛋白质 人体的四种糖蛋白激素英语glycoprotein hormones人绒毛膜促性腺激素hCG黄体生成素LH促卵泡激素FSH和促甲状腺激素TSH都是以同样的该α亚基和各自不同的β亚基组成的二聚体 此α链的个氨基酸残基的序列为 NH  Ala  Pro  Asp  Val  Gln  Asp  Cys  Pro  Glu  Cys  Thr  Leu  Gln  Glu  Asn  Pro  Phe  Phe  Ser  Gln  Pro  Gly  Ala  Pro  Ile  Leu  Gln  Cys  Met  Gly  Cys  Cys  Phe  Ser  Arg  Ala  Tyr  Pro  Thr  Pro  Leu  Arg  Ser  Lys  Lys  Thr  Met  Leu  Val  Gln  Lys  Asn  Val  Thr  Ser  Glu  Ser  Thr  Cys  Cys  Val  Ala  Lys  Ser  Tyr  Asn  Arg  Val  Thr  Val  Met  Gly  Gly  Phe  Lys  Val  Glu  Asn  His  Thr  Ala  Cys  His  Cys  Ser  Thr  Cys  Tyr  Tyr  His  Lys  Ser  COOH