Abnormal pituitary glycoprotein hormone alpha subunit level Decreased pituitary glycoprotein hormone alpha subunit level 2019-04-11T11:33:21Z This alpha subunit is common to luteinizing hormone (LH) , follicle stimulating hormone (FSH) , thyroid stimulating hormone (TSH) and human chorionic gonadotropin (hCG), which are glycoprotein hormones composed of an identical alpha subunit together with a beta subunit that confers biological specificity. The alpha subunit is used as a marker for tumors that produce these hormones. Decreased pituitary glycoprotein alpha subunit level Decreased pituitary glycoprotein polypeptide alpha subunit level An reduced concentration of circulating alpha polypeptide of glycoprotein hormones (NCBI Gene 1081).