合成肽类 (Synthetic Peptides) 50a、由2-10个氨基酸残基构成的合成肽类（Synthetic Peptides） 用适当的前缀，“di”，“tri ”,“tetra”，后接词干Peptide再加 阿拉伯数字来命名。例如Dipeptide-2（二肽-2）。
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这类环形分子在科研方面的生产如已知的缩肽类类似于微生物合成的用于抗生素例如真菌霉素的天然化合物。
The kind of ring molecules grown in this study, known as depsipeptides, are similar to some natural compounds produced by microorganisms that are employed as antibiotics, such as valinomycin.
传统的肽类合成多采用液相化学合成，常用的包括碳二亚胺法，混合酸酐法、酰氯法、叠氮物法等等，为多肽的合成提供了多种选择。
Peptides are traditionally synthesized in liquid phase, such methods are DCC, mixed anhydrides, acyl chloride and azide etc. , which provide more choices for peptides synthesis.
人绒毛膜促性腺激素、人胎盘生乳素是胎盘滋养细胞合成和分泌的肽类激素。
Human chorionic gonadotropic (hCG) and human placental latogen (hPL) are peptide hormones produced and excreted by placental trophoblastic cells during pregnancy.
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