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垂体前叶激素,按其结构上的相似性可分成三组.促肾上腺皮质激素(ACTH)、促黑激素(α-MSH和β-MSH)、脂酸释放激素(β-LPH)和内啡肽(β-EP)组成第一组,这五种激素彼此关系密切,为可变多肽,均由一个共同的前体衍生.组成第二组的有生长激素(GH)和催乳激素(PRL),它们在结构上呈现同源性,具有特定的三维结构的致密球状蛋白质.与第二组垂体激素关系相当密切的有胎盘激素、绒毛膜生长催乳素(CS).第三组激素是彼此密切相关的糖蛋白,包括促性腺激素〔促黄体激素(LH)、促卵泡激素(FSH)〕和促甲状腺激素(TSH).糖蛋白激素由两个分子大小相近的亚基组成,
Anterior pituitary hormone, according to its structural similarity can be divided into three groups: adrenocorticotropic hormone (ACTH), melatonin (α-MSH and β-MSH), fatty acid releasing hormone (β-LPH) and endorphins Peptides (β-EP) comprise the first group, the five hormones are closely related to each other and are variable polypeptides, all derived from a common precursor. The second group consisting of growth hormone (GH) and prolactin (PRL) , They are structurally homologous, with a specific three-dimensional structure of the dense globular protein with the second group closely related to pituitary hormone placental hormone, chorionic growth prolactin (CS) .The third group of hormones are close to each other Related glycoproteins, including gonadotropins [luteinizing hormone (LH), follicle stimulating hormone (FSH)] and thyroid stimulating hormone (TSH), are composed of two subunits of similar molecular size,