Ready-to-use ELISA kits are available for the detection of thyroid stimulating hormone, beta subunit, an alias of the protein, thyroid stimulating hormone subunit beta. The official gene symbol is TSHB. The protein, with a mass of 15.6 kDa and length of 138 residues, is reported to be secreted. It is a member of the Glycoprotein hormones subunit beta family and may be known by other names, including: TSH-B, thyrotropin beta chain, thyroid stimulating hormone beta, and thyrotropin subunit beta.