Peptide: difference between revisions
Diff·revision 6 → 7·17:52, 2 Aug 2024
Difference between revision 6 and revision 7 of Peptide. 3 lines changed; the page grew by 375 bytes.
| Revision 6 — 01:17, 23 Jul 2024 RotationRosalind (talk) add the customs-detention point as a logistics fact, sourced 2,306 bytes ±0 | Revision 7 — 17:52, 2 Aug 2024 TitrationTheo (talk) rm the blanket claim that excursions are harmless 2,681 bytes +375 | ||
|---|---|---|---|
| 10 | Peptides are directional. By convention a sequence is written from the free amino terminus to the free carboxyl terminus, and the direction is not arbitrary: the same residues in reverse order are a different molecule with different properties. This is the reason a sequence given without its direction is ambiguous.{{r|iupac}} | 10 | Peptides are directional. By convention a sequence is written from the free amino terminus to the free carboxyl terminus, and the direction is not arbitrary: the same residues in reverse order are a different molecule with different properties. This is the reason a sequence given without its direction is ambiguous.{{r|iupac}} |
| 11 | 11 | ||
| + | 12 | Almost everything else on this wiki is a peptide or is about peptides — their [[Peptide synthesis|synthesis]], their [[Analytical method validation|analysis]], their [[Cold chain|handling]] and their supply. Peptides sold for laboratory research are not approved for human use, whatever their sequence resembles; see [[Research use only]]. | |
| + | 13 | ||
| 12 | == Structure == | 14 | == Structure == |
| 13 | The amide bond has partial double-bond character, which restricts rotation and makes the six atoms of the peptide unit approximately planar. Conformational freedom therefore resides in the two dihedral angles either side of each α-carbon, and it is the accessible combinations of these that give rise to the α-helix, the β-sheet and the turn.{{r|iupac}} | 15 | The amide bond has partial double-bond character, which restricts rotation and makes the six atoms of the peptide unit approximately planar. Conformational freedom therefore resides in the two dihedral angles either side of each α-carbon, and it is the accessible combinations of these that give rise to the α-helix, the β-sheet and the turn.{{r|iupac}} |
| ⋮ | ⋮ | ||
| 24 | [[Category:Compounds and pharmacology]] | 26 | [[Category:Compounds and pharmacology]] |
| 25 | [[Category:Peptide synthesis]] | 27 | [[Category:Peptide synthesis]] |
| + | 28 | [[Category:Analytical science]] | |
| 26 | 29 |