Results 11 to 20 of about 6,439 (154)
Tracking the Electron Transfer Cascade in European Robin Cryptochrome 4 Mutants [PDF]
, 2022 The primary step in the elusive ability of migratory birds to sense weak Earth-strength magnetic fields is supposedly the light-induced formation of a long-lived, magnetically sensitive radical pair inside a cryptochrome flavoprotein located in the retina of these birds.
arxiv +1 more source
Proton transfer in histidine-tryptophan heterodimers embedded in helium droplets [PDF]
Journal of Chemical Physics 142, 114306 (2015), 2015 We used cold helium droplets as nano-scale reactors to form and ionize, by electron bombardment and charge transfer, aromatic amino acid heterodimers of histidine with tryptophan, methyl-tryptophan, and indole. The molecular interaction occurring through an N-H...N hydrogen bond leads to a proton transfer from the indole group of tryptophan to the ...
arxiv +1 more source
Key Enzymes and Proteins of Crop Insects as Candidate for RNAi Based Gene Silencing
Frontiers in Physiology, 2015 RNA interference (RNAi) is a mechanism of homology dependent gene silencing present in plants and animals. It operates through 21-24 nucleotides small RNAs which are processed through a set of core enzymatic machinery that involves Dicer and Argonaute ...
Vijaya Sudhakara Rao K +3 more
doaj +1 more source
Frontiers in Pharmacology, 2017 Indoxyl sulfate (IS) is a protein-bound uremic toxin resulting from the metabolism of dietary tryptophan which accumulates in patients with impaired renal function, such as chronic kidney disease (CKD).
Simona Adesso +9 more
doaj +1 more source
tRNA-isoleucine-tryptophan Composite Gene [PDF]
Biochemical and biophysical Research Communications 339 (2005)
37-40, 2005 Transfer-RNA genes in archaea often have introns intervening between exon sequences. The structural motif at the boundary between exon and intron is the bulge-helix-bulge. Computational investigations of these boundary structures in H. marismortui lead us to propose that tRNA-isoleucine and tRNA-tryptophan genes are co-located.
arxiv +1 more source
BMC Microbiology, 2010 Background Acidithiobacillus ferrooxidans is chemolithoautotrophic γ-proteobacterium that thrives at extremely low pH (pH 1-2). Although a substantial amount of information is available regarding CO2 uptake and fixation in a variety of facultative ...
Esparza Mario +4 more
doaj +1 more source
Tryptophan-containing proteins as label-free nanothermometers [PDF]
arXiv, 2021 There remains a need for techniques to monitor thermal processes at high spatiotemporal resolution, with myriad potential applications in chemistry, biology, and engineering. Measurement of temperature from nanoscale molecular phenomena are particularly promising due to their general compatibility with biological systems.
arxiv
Boolean models of the transport, synthesis, and metabolism of tryptophan in Escherichia Coli [PDF]
arXiv, 2022 The tryptophan (trp) operon in E. coli codes for the proteins responsible for the synthesis of the amino acid tryptophan from chorismic acid, and has been one of the most well-studied gene networks since its discovery in the 1960s. The tryptophanase (tna) operon codes for proteins needed to transport and metabolize it.
arxiv
Purcell radiative rate enhancement of label-free proteins with ultraviolet aluminum plasmonics [PDF]
, 2021 The vast majority of proteins are intrinsically fluorescent in the ultraviolet, thanks to the emission from their tryptophan and tyrosine amino-acid constituents. However, the protein autofluorescence quantum yields are generally very low due to the prevailing quenching mechanisms by other amino acids inside the protein.
arxiv +1 more source
A systematic study of the valence electronic structure of cyclo(Gly-Phe), cyclo(Trp-Tyr) and cyclo(Trp-Trp) dipeptides in gas phase [PDF]
, 2021 The electronic energy levels of cyclo(Glycine-Phenylalanine), cyclo(Tryptophan-Tyrosine) and cyclo(Tryptophan-Tryptophan) dipeptides are investigated with a joint experimental and theoretical approach. Experimentally, valence photoelectron spectra in the gas phase are measured using VUV radiation.
arxiv +1 more source