An interesting feature of this derivatization procedure is that it distinguishes aspartic and glutamic acid from the respective amides. The structure of asparagine and glutamine derivatives has been established. A survey of oxazolidinone mass spectra has provided a list of diagnostically useful ions. ...
Proton magnetic resonance spectra of methylthiohydantoin (3-methyl-2-thiohydantoin), thiohydantoin (2-thiohydantoin), and hydantoin derivatives of amino acids were studied in dimethyl sulfoxide-d6. Their parent amino acids could be identified by the spectra. An application to the N- and C-...
MAM sample analysis revealed enrichment in aerotolerantProteobacteria, probably selected by a gradient of oxygen that decreases from tissue to lumen, and inStreptococcusandClostridiumspp., highly fermenting bacteria. On the other hand, LAM microbiota showed an increased abundance inBacteroides, Prevotella,...
The fast atom bombardment mass spectra of 24 α‐amino acids have been studied. These include the mass spectra as well as the metastable ion MI and collisional activation CA spectra of [M + H]+ and [M ? H]? ions. The extent of the common neutral losses as NH3, H2O and CO2H2 in ...
C Merritt,DH Robertson - 《Journal of Chromatographic Science》 被引量: 99发表: 1967年 In-source pyrolysis-field ionization mass spectrometry and Curie-point pyrolysis-gas chromatography/mass spectrometry of amino acids in humic substances an... With the aid of in-source pyrolysis-field ionization...
This depot has no clear human counterpart as retroperitoneal or inguinal WAT would have, but those are however more susceptible to the browning pro- cess and thus not an optimal choice for analysis of white adipocytes in vivo. In the current study, we investigated the effect of Fto deple- ...
An experiment was conducted with 72 Bovans Brown laying hens to determine the effect of dietary crude glycerin on laying performance; egg quality; retentio... S Swiatkiewicz,J Koreleski - 《Poultry Science》 被引量: 68发表: 2009年 Effect of crude glycerin level in the diet of laying hens...
An "Averagine" model is used to describe the composition of an "average amino acid", which can then be used to approximate the composition and isotopic abundance of a combination of specific amino acids. Given that often the only solution available is to guess at the composition of a ...
addition to intact characterization, you can confirm amino acid sequence, identify site and type of known/unknown post translational modifications, while providing relative amounts using Peptide Mapping workflows. Additional features include disulfide linkage, sequence variant analysis, and sequence ...
(MS/MS) is used to generate peptide fragmentation spectra that are computationally matched to knownpeptide sequencesfrom a database of proteins. MS quantification can be achieved using label-free, stableisotope labelingofamino acidsin cell culture (SILAC), or bytandem mass tag(TMT) methods (...