| Revision as of 00:58, 1 March 2017 edit141.132.80.190 (talk) Linked word 'chiral' in first line to Misplaced Pages page on chirality← Previous edit |
Revision as of 11:47, 21 July 2017 edit undoDewritech (talk | contribs)Extended confirmed users, New page reviewers, Rollbackers174,183 edits →top: clean up, removed underlinked tag, typo(s) fixed: so called → so-called using AWBNext edit → |
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Amino acids are ] compounds that are present in living organisms as free compounds or as polymers such as peptides or proteins. The 20 L-] present in proteins and peptides are defined as ]. About 500 amino acids are known and have been classified in many ways base on their chemical/physical properties.<ref>{{cite journal |title = New Naturally Occurring Amino Acids|vauthors = Wagner I, Musso H|doi = 10.1002/anie.198308161|journal = ]|volume = 22|issue = 11|pages = 816–28|date = November 1983}}{{Closed access}}</ref> |
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Amino acids are ] compounds that are present in living organisms as free compounds or as polymers such as peptides or proteins. The 20 L-] present in proteins and peptides are defined as ]. About 500 amino acids are known and have been classified in many ways base on their chemical/physical properties.<ref>{{cite journal |title = New Naturally Occurring Amino Acids|vauthors = Wagner I, Musso H|doi = 10.1002/anie.198308161|journal = ]|volume = 22|issue = 11|pages = 816–28|date = November 1983}}{{Closed access}}</ref> |
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All α-amino acids (AA) but glycine exist in either of the two enantiomers, which are mirror images of each other (the so called D- and L-enantiomers). |
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All α-amino acids (AA) but glycine exist in either of the two enantiomers, which are mirror images of each other (the so-called D- and L-enantiomers). |
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Although present in a less concentration in mammals, free D-amino acids play central roles: as an example D-serine is one of the main neuromodulators of the glutamatergic neurotransmission and D-aspartate is fundamental for brain development in fetus. |
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Although present in a less concentration in mammals, free D-amino acids play central roles: as an example D-serine is one of the main neuromodulators of the glutamatergic neurotransmission and D-aspartate is fundamental for brain development in fetus. |
All α-amino acids (AA) but glycine exist in either of the two enantiomers, which are mirror images of each other (the so-called D- and L-enantiomers).
Although present in a less concentration in mammals, free D-amino acids play central roles: as an example D-serine is one of the main neuromodulators of the glutamatergic neurotransmission and D-aspartate is fundamental for brain development in fetus.
In peptidoglycan, D-alanine or D-glutamate contribute to antibiotic resistance in some bacteria.
Many diverse bacteria synthesize D-amino acids such as, D-methionine and D-leucine.
D-amino acids are also present in many venoms from platypus, funnel web spider, and cone snail produced by the action of isomerases.
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