Prothoracicotropic hormone (PTTH) controls the synthesis of ecdysteroids (molting hormones) by the insect prothoracic gland and thereby plays a critical role in insect growth, molting, and metamorphosis. PTTH has been purified, and cDNA clones obtained, from only one insect, the silkmoth Bombyx mon. Recently, a partial amino acid sequence was obtained for-a… (More)
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