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  • Title: Excretion of 3-methylhistidine by pregnant women: evidence for a biphasic system of protein metabolism in human pregnancy.
    Author: Naismith DJ, Emery PW.
    Journal: Eur J Clin Nutr; 1988 Jun; 42(6):483-9. PubMed ID: 3409856.
    Abstract:
    A positive nitrogen balance is established in early pregnancy and persists unchanged until parturition. The excretion of 3-methylhistidine is markedly increased in late pregnancy, indicating that protein retained in the maternal muscles in early pregnancy is later catabolized to provide a major source of amino acids for fetal protein synthesis.
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