In insects, this hormone stimulates the prothoracic gland to secrete ecdysone. It is abbreviated as BH. It was originally called brain hormone because it was secreted from the brain, but since it was discovered that the brain is an organ that secretes multiple types of hormones, it is now called prothoracicotropic hormone (or prothoracicotropin). It is a peptide or protein hormone, and several molecular species are known. In silkworms, it has a molecular weight of 4,300 and 23,000 daltons. Source: Heibonsha World Encyclopedia, 2nd Edition Information |
昆虫で,前胸腺を刺激してエクジソン分泌を促すホルモン。BHと略記。はじめ脳から分泌されることから脳ホルモンと呼ばれたが,脳が複数種のホルモン分泌器官であることがわかり,現在では前胸腺刺激ホルモンprothoracicotropic hormone(またはprothoracicotropin)の名で呼ばれる。ペプチドもしくはタンパク性ホルモンで,いくつかの分子種が知られている。カイコでは分子量4300と2万3000ドルトン(dalton。
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