(ak´tĭ-vin) any of several proteins that stimulate the secretion of follicle-stimulating hormone, play roles in regulation of the neuroendocrine system, help regulate production of other hormones, and affect the functioning of the gonads.
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b subunits of inhibin (which is an ab heterodimer); since there are two isoforms, A and B, there are three forms of activin, AA, BB and AB. Receptor has serine/threonine kinase activity in its cytoplasmic domain.
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Type: Term Pronunciation: ak′ti-vin Definitions: 1. Placental hormone that reaches maximum levels in maternal serum during labor; helps to regulate production of gonadotropin-releasing hormones, human chorionic gonadotropin, and steroids by the placenta.
Found on
http://www.medilexicon.com/medicaldictionary.php?t=976
No exact match found.
