pituitaries from adult male rana pipiens were cultured in medium alone , 10 or 100 ng/ml thyrotropin-releasing hormone ( trh ) , 1000 ng/ml ovine corticotropin-releasing hormone ( ocrh ) , or 300 ng/ml synthetic mammalian gonadotropin-releasing hormone ( mgnrh ) ( these represent approximately equimolar doses ) for two 2-hr incubation periods .
C0032002
pituitaries
C0040162
thyrotropin-releasing hormone