{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,18]],"date-time":"2026-08-18T01:37:44Z","timestamp":1787017064095,"version":"build-2736575974"},"reference-count":91,"publisher":"Canadian Science Publishing","issue":"6","license":[{"start":{"date-parts":[[2016,6,1]],"date-time":"2016-06-01T00:00:00Z","timestamp":1464739200000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/www.nrcresearchpress.com\/page\/about\/CorporateTextAndDataMining"}],"content-domain":{"domain":["cdnsciencepub.com"],"crossmark-restriction":false},"short-container-title":["Appl. Physiol. Nutr. Metab."],"published-print":{"date-parts":[[2016,6]]},"abstract":"<jats:p>Methionine is an indispensable amino acid that, when not incorporated into protein, is converted into the methyl donor S-adenosylmethionine as entry into the methionine cycle. Following transmethylation, homocysteine is either remethylated to reform methionine or irreversibly trans-sulfurated to form cysteine. Methionine flux to transmethylation and to protein synthesis are both high in the neonate and this review focuses on the dynamics of methionine supply and demand during early development, when growth requires expansion of pools of protein and transmethylation products such as creatine and phosphatidylcholine (PC). The nutrients folate and betaine (derived from choline) donate a methyl group during remethylation, providing an endogenous supply of methionine to meet the methionine demand. During early development, variability in the dietary supply of these methionine cycle-related nutrients can affect both the supply and the demand of methionine. For example, a greater need for creatine synthesis can limit methionine availability for protein and PC synthesis, whereas increased availability of remethylation nutrients can increase protein synthesis if dietary methionine is limiting. Moreover, changes to methyl group availability early in life can lead to permanent changes in epigenetic patterns of DNA methylation, which have been implicated in the early origins of adult disease phenomena. This review aims to summarize how changes in methyl supply and demand can affect the availability of methionine for various functions and highlights the importance of variability in methionine-related nutrients in the infant diet.<\/jats:p>","DOI":"10.1139\/apnm-2015-0577","type":"journal-article","created":{"date-parts":[[2016,2,26]],"date-time":"2016-02-26T17:35:39Z","timestamp":1456508139000},"page":"581-587","update-policy":"https:\/\/doi.org\/10.1139\/csp-crossmark-policy","source":"Crossref","is-referenced-by-count":23,"title":["The dynamics of methionine supply and demand during early development"],"prefix":"10.1139","volume":"41","author":[{"given":"Laura E.","family":"McBreairty","sequence":"first","affiliation":[{"name":"Department of Biochemistry, Memorial University of Newfoundland, St. John\u2019s, NL A1B 3X9, Canada."},{"name":"Department of Biochemistry, Memorial University of Newfoundland, St. John\u2019s, NL A1B 3X9, Canada."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Robert F.","family":"Bertolo","sequence":"additional","affiliation":[{"name":"Department of Biochemistry, Memorial University of Newfoundland, St. John\u2019s, NL A1B 3X9, Canada."},{"name":"Department of Biochemistry, Memorial University of Newfoundland, St. John\u2019s, NL A1B 3X9, Canada."}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"155","reference":[{"key":"refg1\/ref1","doi-asserted-by":"publisher","DOI":"10.1016\/j.jnutbio.2005.02.006"},{"issue":"8489","key":"refg2\/ref2","doi-asserted-by":"crossref","first-page":"1077","DOI":"10.1016\/S0140-6736(86)91340-1","volume":"1","author":"Barker D.J.","year":"1986","journal-title":"Lancet"},{"key":"refg3\/ref3","doi-asserted-by":"publisher","DOI":"10.1136\/jech.43.3.237"},{"key":"refg4\/ref4","doi-asserted-by":"publisher","DOI":"10.1152\/ajpendo.91021.2008"},{"key":"refg5\/ref5","doi-asserted-by":"crossref","first-page":"167","DOI":"10.1016\/S0021-9258(18)51422-8","volume":"138","author":"Bloch K.","year":"1941","journal-title":"J. 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