Thyrotropin (TSH), human follicle stimulating hormone (FSH), human luteinizing hormone (LH) and human chorionic gonadotropin (hCG) are glycoprotein hormones. They are composed of two distinct, non-covalently bound subunits: a and ß. The a-subunits of TSH, LH, FSH and hCG are immunologically identical. Certain amount of free a-subunit is found under normal conditions in the circulation. Its measurement is useful in the diagnosis and follow-up of pituitary tumors and trophoblastic diseases.

Name IRMA alpha-Subunit
Ref. IM1186
Method IRMA
Type Coated tubes
Tests 100
Max. Activity (kBq) 370
Sensitivity 0.03 IU/L
Incubation conditions 1 hr/RT;shaking
Calibrator range 0;0.25-10 IU/L
Sample volume (μL) 100
Sample form serum; plasma
Instructions for Use         
Reagents supplied separately Estradiol + alpha Subunit diluent (2 mL), Ref. B64533