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1 s-1 (<Glu-Arg-Thr-Lys-Arg-MCA; where <Glu is pyroglutamic acid).
2 teins was used for the identification of the pyroglutamic acid.
3 cular colored compounds in the presence of l-pyroglutamic acid.
4 s of sterically constrained beta-substituted pyroglutamic acids.
5 to the diastereomerically pure 3-substituted pyroglutamic acids.
6 pproach also became valuable for spirocyclic pyroglutamic acids.
7 = 0.046), glutamic acid (- 0.24; 0.023), and pyroglutamic acid (- 0.17; 0.035) were linked with decre
8                    Coupling of amine 21 with pyroglutamic acid affords the naturally occurring tripep
9 -terminal and carboxyl-terminal residues are pyroglutamic acid and proline, respectively.
10 arious cap groups, including the amino acids pyroglutamic acid and proline.
11                 The synthesis started from l-pyroglutamic acid and relied on utilization of (a) a ste
12 iate use for preparing various 3-substituted pyroglutamic acids and related amino acids (glutamic aci
13 e use for preparing various beta-substituted pyroglutamic acids and related compounds.
14 cally efficient approach to beta-substituted pyroglutamic acids and relevant compounds.
15 hree known umami compounds (l-glutamic acid, pyroglutamic acid, and 5'-adenosine monophosphate).
16  optically pure bromide 37, derived from (S)-pyroglutamic acid, and followed a similar sequence invol
17 l, USGS41a, still has significant amounts of pyroglutamic acid as impurity, rendering some caution ne
18 erial indeed contains substantial amounts of pyroglutamic acid as suggested previously in the literat
19 ic acid at pH 6.2 and increased formation of pyroglutamic acid at pH 4 and pH 8.
20 rent pH values, showing minimal formation of pyroglutamic acid at pH 6.2 and increased formation of p
21 integrin structures reveal details including pyroglutamic acid at the beta2 N terminus and bending wi
22 s (-1858.96) and the subsequent formation of pyroglutamic acid at the new N-terminus Gln (-17.03).
23            However, the sum of glutamine and pyroglutamic acid concentrations in each sample remains
24 -mass spectrometry method could separate the pyroglutamic acid-containing light chains from the nativ
25 controlled by 3-phenyl or 4-benzyl groups in pyroglutamic acid derivatives 3 or 9, respectively.
26  with a catalytic amount of base to form the pyroglutamic acid derivatives.
27 mmetric phosphoramidite ligands derived from pyroglutamic acid for use in both oxidative and redox-ne
28                                              Pyroglutamic acid formation also occurs.
29            These variants were attributed to pyroglutamic acid formation and decarboxylation on the p
30           In this study, we investigated the pyroglutamic acid formation from N-terminal glutamic aci
31 ocated at the N-terminus of proteins undergo pyroglutamic acid formation in vitro.
32  method for the identification of N-terminal pyroglutamic acid formation will be discussed.
33 s such as oxidation, deamidation, N-terminal pyroglutamic acid formation, and glycosylation.
34               We identified the formation of pyroglutamic acid from N-terminal glutamic acid in the h
35                                              Pyroglutamic acid-glucose Amadori product, quercetin-3-O
36 several hydroxycinnamic acid derivatives and pyroglutamic acid-glucose Amadori rearrangement products
37 cle), carnitine (fatty acid metabolism), and pyroglutamic acid (glutathione metabolism).
38  and chemical sequence analyses, where Pca = pyroglutamic acid, Hyp = hydroxyproline, Gla = gamma-car
39 l drops by up to 75% and, concomitantly, the pyroglutamic acid level increases proportionately.
40 onsidering the sum of apparent glutamine and pyroglutamic acid levels, obtained from the contemporary
41 e crystals of enantiomerically pure D- and L-pyroglutamic acid (PGA) are capable of recurring self-ac
42                             We report herein pyroglutamic acid (PGA)-based well-defined homopolymers
43 ccurring cholesterol but not by co-occurring pyroglutamic acid (PGA).
44 or peptides have been reported to cyclize to pyroglutamic acid (pGlu) during liquid chromatography (L
45  of these was determined with the N-terminal pyroglutamic acid residue (pGlu1) and a complete C-termi
46 d-glucose model reactions with and without l-pyroglutamic acid revealed an increase of low molecular
47 s of cell density on succinate, proline, and pyroglutamic acid systems are also reported.
48 ues of pyochelin have been prepared from Boc-pyroglutamic acid-tert-butyl ester in 11 and 13 steps.
49 tified a surprising glutamine cyclization to pyroglutamic acid that occurs during protein removal.
50 fast occurring cyclization of l-glutamine to pyroglutamic acid, the typical amino-carbonyl reaction w
51  by the replacement of N-terminal proline by pyroglutamic acid; the long chains of gNaA and BngNAP1B
52 rbapenam carboxylic acid was prepared from L-pyroglutamic acid to unambiguously establish its absolut
53 beta-lactam scaffold 11 were prepared from L-pyroglutamic acid via substrate-controlled electrophilic
54     Closer investigations could prove that l-pyroglutamic acid was able to influence non-enzymatic br
55                     In the first approach, l-pyroglutamic acid was functionalized adopting new as wel
56                                  Alanine and pyroglutamic acid were significantly reduced in the BPD
57          A series of biologically intriguing pyroglutamic acids were synthesized in racemic form by e
58  the preparation of several beta-substituted pyroglutamic acids which include electron-releasing and
59 e-ketose transformation in the presence of l-pyroglutamic acid, which are signs of a faster proceedin
60 ymmetrical diketopiperazines from commercial pyroglutamic acid with control of product dictated by re