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    男人扒开女人内裤强吻桶进去
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    Peptide science

    A peptide is an intermediate product of protein hydrolysis, a compound formed by linking alpha-amino acids together by peptide bonds. A compound obtained by dehydration condensation of 2 to 9 amino acid molecules is called an oligopeptide, and a compound obtained by dehydration condensation of 10 to 50 amino acid molecules is a polypeptide.
    The polypeptide has two kinds of biologically active polypeptides and artificial synthetic polypeptides. Polypeptides extracted from organisms are highly active and are therefore called active peptides. Polypeptides less than 1000 Daltons are called small molecule active peptides, and only small molecule active peptides can produce good effects on the human body.
    The active peptide mainly controls the growth, development, immune regulation and metabolism of the human body. It is in a state of balance in the human body. If the active peptide is reduced, the function of the human body changes significantly.
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