Amide in a sentence

Amide reactions : Mechanism for acid-catalyzed hydrolysis of an amide. citation Amides undergo many chemical reactions, although they are less reactive than esters.

Like many proteases, chymotrypsin will also hydrolyse amide bonds in vitro, a virtue that enabled the use of substrate analogs such as N-acetyl-L-phenylalanine p-nitrophenyl amide for enzyme assays.

This intermediate tends to revert to the amide form, expelling the attacking group, since the amide form is usually favored by free energy, (presumably due to the strong resonance stabilization of the peptide group).

Amide can also refer to the conjugate base of ammonia (the anion H 2 N − ) or of an organic amine (an anion R 2 N − ).

As a pyramidal bond geometry is forced upon the nitrogen atom by the ring strain, the resonance of the amide bond is reduced, and the carbonyl becomes more ketone -like.

Ceramides (N-acyl-sphingoid bases) are a major subclass of sphingoid base derivatives with an amide -linked fatty acid.

Figure 1: Dehydration synthesis (condensation) reaction forming an amide Cis/trans isomers of the peptide group Significant delocalisation of the lone pair of electrons on the nitrogen atom gives the group a partial double bond character.

For asparagine, either product results in the loss of the amide group, hence "deamidation".

For completeness, the proposal that proteins contained amide linkages was made as early as 1882 by the French chemist E. Grimaux.

H 2 O creates a strong band that overlaps with the amide I region of proteins.

Here, sodium amide is used as the nucleophile yielding 2-aminopyridine.

However, additional molecular interactions may render the amide form less stable; the amino group is expelled instead, resulting in an ester (Ser/Thr) or thioester (Cys) bond in place of the peptide bond.

In addition, trypsin contains an "oxyanion hole" formed by the backbone amide hydrogen atoms of Gly-193 and Ser-195, which serves to stabilize the developing negative charge on the carbonyl oxygen atom of the cleaved amides.

It has two ionizable groups in the physiological range (the amino group in alpha-position to the amide carbonyl group and the carboxyl group).

It is attached to the polypeptide C-terminus through an amide linkage that then connects to ethanolamine, thence to sundry sugars and finally to the phosphatidylinositol lipid moiety.

Modafinil is the primary metabolite of adrafinil, lacking the polar -OH group on its terminal amide, citation and has similar activity to the parent drug but is much more widely used.

Nomenclature main In the usual nomenclature, one adds the term "amide" to the stem of the parent acid's name.

Only proline differs from this basic structure as it contains an unusual ring to the N-end amine group, which forces the CO–NH amide moiety into a fixed conformation.

Peptide bond A peptide bond (amide bond) is a covalent chemical bond linking two consecutive amino acid monomers along a peptide or protein chain. citation Pauling L. (1960) The Nature of the Chemical Bond, 3rd.

Peptides (from Gr. : πεπτός, peptós "digested"; derived from πέσσειν, péssein "to digest") are biologically occurring short chains of amino acid monomers linked by peptide ( amide ) bonds.