Results 51 to 60 of about 186,471 (141)

Tautomerism in Neutral Histidine

Angewandte Chemie International Edition, 2014
AbstractHistidine is an important natural amino acid, involved in many relevant biological processes, which, because of its physical properties, proved difficult to characterize experimentally in its neutral form. In this work, neutral histidine has been generated in the gas phase by laser ablation of solid samples and its NεH tautomeric form unraveled
Bermúdez, Celina, Mata, Santiago, Cabezas, Carlos, Alonso, José L.   +3 more
openaire   +3 more sources

Application of the Triangular Spatial Relationship Algorithm in Representing and Quantifying Conformational Changes in Chlorophylls and Protein Local Environments

Photochem
Chemically identical chlorophyll (Chl) molecules undergo conformational changes when they are embedded in a protein matrix. The conformational changes will modulate their absorption spectra to meet the need for programmed excitation energy transfer or ...
Tarikul I. Milon, Khairum H. Orthi, Krishna Rauniyar, Rhen M. Renfrow, August A. Gallo, Wu Xu   +5 more
doaj   +1 more source

A note on the evaluation of a beta-casein variant in bovine breeds by allele-specific PCR and relevance to β-casomorphin [PDF]

, 2008
peer-reviewedThis work was supported by Enterprise Ireland and by a Teagasc Walsh fellowship to A.F. Keating.Two genetic variants of the bovine β-casein gene (A1 and B) encode a histidine residue at codon 67, resulting in potential liberation of a ...
Cairns, M.T., Keating, A.F., Ross, R Paul, Smith, T.J.   +3 more
core  

β-Catenin is a pH sensor with decreased stability at higher intracellular pH. [PDF]

, 2018
β-Catenin functions as an adherens junction protein for cell-cell adhesion and as a signaling protein. β-catenin function is dependent on its stability, which is regulated by protein-protein interactions that stabilize β-catenin or target it for ...
Aberle, Baumgartner, Bree K. Grillo-Hill, Chairoungdua, Choi, Choi, Cold Spring Harbor Protocols, Dai, Daugherty, Denker, Denker, Diane L. Barber, Endo, Forbes, Forbes, Frantz, Frescas, Grillo-Hill, Ha, Hart, Ismahan Chire, Jobelle Peralta, Katharine A. White, Klaus, Krausova, Lee, Li, Liu, Liu, Mario Esquivel, Megy, Morin, Pai, Parks, Peifer, Peifer, Petherick, Pronobis, Reim, Reshkin, Sadot, Sahai-Hernandez, Schönichen, Sedgwick, Shafique, Simons, Stamos, Stehbens, Ulmschneider, Valenta, Vivian N. Bui, Waghmare, Webb, White, White, Wolff, Wu   +56 more
core   +1 more source

A pH Dependant Switch in DHP Oxidation Mechanism [PDF]

, 2017
Dehaloperoxidase (DHP) is a multifunctional enzyme found in Amphitrite ornata, a sediment-dwelling marine worm. This enzyme possess the structure of a traditional hemoglobin enzyme and serves as the primary oxygen carrier in A.
Fehr, Travis
core   +1 more source

Overlapping functionality of the Pht proteins in zinc homeostasis of streptococcus pneumoniae [PDF]

, 2014
Streptococcus pneumoniae is a globally significant pathogen that causes a range of diseases, including pneumonia, sepsis, meningitis, and otitis media. Its ability to cause disease depends upon the acquisition of nutrients from its environment, including
Eijkelkamp, Bart A., Harvey, Richard M., Hughes, Catherine E., McDevitt, Christopher A., Paton, James C., Plumptre, Charles D.   +5 more
core   +1 more source

N‐methylation of histidine to tune tautomeric preferences in histidine‐heme coordination and enzyme‐mimetic catalysis

Smart Molecules
Enzymes with active sites involving histidine selectively utilize either the δ‐ or ε‐nitrogen atom (Nδ or Nε) of the histidine imidazole for catalysis.
Ruikai Du, Yunbo Lv, Haifeng Wu, Baoli Zhang, Yuanxi Liu, Shichao Xu, Shan Li, Zhen‐Gang Wang   +7 more
doaj   +1 more source

The Human SLC7A5 (LAT1): The Intriguing Histidine/Large Neutral Amino Acid Transporter and Its Relevance to Human Health

Frontiers in Chemistry, 2018
SLC7A5, known as LAT1, belongs to the APC superfamily and forms a heterodimeric amino acid transporter interacting with the glycoprotein CD98 (SLC3A2) through a conserved disulfide.
Mariafrancesca Scalise, Michele Galluccio, Lara Console, Lorena Pochini, Cesare Indiveri, Cesare Indiveri   +5 more
doaj   +1 more source

Incorporation in vitro of labeled amino acids into proteins of rabbit reticuloytes [PDF]

, 1952
Continuing our work on the incorporation of labeled amino acids into proteins (1), we have begun a study of the incorporation in vitro of C14-labeled glycine, L-histidine, L-leucine, and L-lysine into the proteins of rabbit reticulocytes.
Borsook, Henry, Deasy, Clara L., Haagen-Smit, A. J., Keighley, Geoffrey, Lowy, Peter H.   +4 more
core  

Production of biogenic amines by Enterococci

Czech Journal of Food Sciences, 2009
Enterococci were presented in all tested samples of raw cow milk (six samples) at the level 103-105 CFU/ml, fresh cheeses (five samples) at the level 102-106 CFU/g and semi-hard cheeses (five samples) at the level 103-105 CFU/g.
Kateřina Kučerová, Hana Svobodová, Štěpán Tůma, Iva Ondráčková, Milada Plocková   +4 more
doaj   +1 more source