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prohormone
prohormone n.
Brit. 
/prə(ʊ)ˈhɔːməʊn/
, /prə(ʊ)ˈhɔːməʊn/U.S. /proʊˈhɔrˌmoʊn/
Physiology a precursor of a hormone./proʊˈhɔrˌmoʊn/ΘΚΠ
the world > life > biology > substance > process stimulators or inhibitors > hormone > [noun] > parahormone or prohormone
parahormone1918
prohormone1935
1935 Amer. Jrnl. Physiol. 112 511 Many of the published opinions concerning the prohormone have been made from incidental observations, rather than from directed experiments planned to give information concerning its existence or properties.
1970 Proc. National Acad. Sci. U.S.A. 47 1637 Unlike the islet cell, which stores hormone primarily in the form of insulin, the parathyroid may store its hormone as the prohormone, with conversion taking place when the gland is stimulated.
1989 Psychiatric Devel. 7 249 Testosterone is a prohormone that, once inside a cell, can be converted into an estrogen (estradiol) through an aromatization pathway.
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