Results 241 to 250 of about 1,001,494 (307)
Some of the next articles are maybe not open access.
Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2023
We have measured the terahertz spectrum of pure l-tyrosine at nineteen temperatures in the range 6K to 300K using a synchrotron as the source of radiation. By fitting the temperature dependence of the observed modes with a Bose-Einstein model, we determine unequivocal low-frequency modes of l-tyrosine at absolute zero temperature occur at 1.02 ± 0.01 ...
T.J. Sanders +5 more
openaire +3 more sources
We have measured the terahertz spectrum of pure l-tyrosine at nineteen temperatures in the range 6K to 300K using a synchrotron as the source of radiation. By fitting the temperature dependence of the observed modes with a Bose-Einstein model, we determine unequivocal low-frequency modes of l-tyrosine at absolute zero temperature occur at 1.02 ± 0.01 ...
T.J. Sanders +5 more
openaire +3 more sources
The FASEB Journal, 1992
A major process through which environmental information is transmitted into cells is via activation of protein tyrosine kinases. Receptor tyrosine kinases contain extracellular ligand recognition, single membrane spanning, and cytoplasmic protein tyrosine kinase domains. The cytoplasmic kinase core is flanked by regulatory segments,
D L, Cadena, G N, Gill
openaire +2 more sources
A major process through which environmental information is transmitted into cells is via activation of protein tyrosine kinases. Receptor tyrosine kinases contain extracellular ligand recognition, single membrane spanning, and cytoplasmic protein tyrosine kinase domains. The cytoplasmic kinase core is flanked by regulatory segments,
D L, Cadena, G N, Gill
openaire +2 more sources
International Journal of Oncology, 1997
Protein tyrosine phosphatases (PTPases) balance the action of tyrosine kinases to maintain a set level of cellular tyrosine phosphorylation. Increases in tyrosine phosphorylation produced by transformation with constitutively active tyrosine kinases can initiate cellular proliferation. PTPases may act as tumor suppressors to counteract the transforming
B, Goldsmith, S, Koizumi
openaire +2 more sources
Protein tyrosine phosphatases (PTPases) balance the action of tyrosine kinases to maintain a set level of cellular tyrosine phosphorylation. Increases in tyrosine phosphorylation produced by transformation with constitutively active tyrosine kinases can initiate cellular proliferation. PTPases may act as tumor suppressors to counteract the transforming
B, Goldsmith, S, Koizumi
openaire +2 more sources
Annual Review of Biochemistry, 1993
The process of reversible phosphorylation is perhaps the cell's most prevalent means of regulation at the molecular level. It has been estimated that up to 30% of all cellular proteins are phosphorylated, and phosphorylation has been shown to play a crucial regulatory role in such diverse cellular events as metabolism, growth and differentiation ...
K M, Walton, J E, Dixon
openaire +2 more sources
The process of reversible phosphorylation is perhaps the cell's most prevalent means of regulation at the molecular level. It has been estimated that up to 30% of all cellular proteins are phosphorylated, and phosphorylation has been shown to play a crucial regulatory role in such diverse cellular events as metabolism, growth and differentiation ...
K M, Walton, J E, Dixon
openaire +2 more sources
Tyrosine-Bearing Polyphosphazenes
Biomacromolecules, 2003Tyrosine-functionalized polyphosphazenes were synthesized, and their hydrolytic stability, pH-sensitive behavior, and hydrogel-forming capabilities were investigated. The physical and chemical properties of the polymers varied with the type of linkage between the tyrosine unit and phosphazene backbone.
Harry R, Allcock +3 more
openaire +2 more sources
Journal of Psychiatric Research, 1982
The catecholamine hypothesis of affective disorders postulates that depression reflects inadequate norepinephrine activity at unspecified brain centers that regulate mood. In light of experimental data showing that the oral administration of tyrosine, precursor of the catecholamine series of neurotransmitters, can increase brain norepinephrine ...
A J, Gelenberg +3 more
openaire +2 more sources
The catecholamine hypothesis of affective disorders postulates that depression reflects inadequate norepinephrine activity at unspecified brain centers that regulate mood. In light of experimental data showing that the oral administration of tyrosine, precursor of the catecholamine series of neurotransmitters, can increase brain norepinephrine ...
A J, Gelenberg +3 more
openaire +2 more sources
Frontiers in Bioscience, 2002
The molecular mechanisms of signal transduction have been at the focus of increasingly intense scientific research. As a result, our understanding of protein tyrosine kinase-mediated signaling has advanced at an unprecedented pace during the past decade.
T, Mustelin +7 more
openaire +2 more sources
The molecular mechanisms of signal transduction have been at the focus of increasingly intense scientific research. As a result, our understanding of protein tyrosine kinase-mediated signaling has advanced at an unprecedented pace during the past decade.
T, Mustelin +7 more
openaire +2 more sources
Tyrosine transaminase: Inactivation by tyrosine metabolic end products
Biochimica et Biophysica Acta (BBA) - Enzymology, 1970Abstract The tyrosine metabolites, p- hydroxyphenylpyruvate , homogentisate, and fumarylacetoacetate were examined as inhibitors and inactivators of purified rat liver tyrosine α-ketoglutarate transaminase. Of these, homogentisate proved to be a very powerful inactivator when the enzyme was preincubated with it. This effect was blocked by prior
M, Civen, C, Wilson, C B, Brown
openaire +2 more sources
Radiation Physics and Chemistry (1977), 1982
Abstract Blue fluorescence characteristics of dityrosine appeared in y -irradiated solutions of tyrosine, glycyl- L -tyrosine or polytyrosine (MW 110,000). The intensity of fluorescence was used for the determination of the dityrosine concentration in hydrolysed samples.
Grzegorz Boguta, Antoni M. Dancewicz
openaire +1 more source
Abstract Blue fluorescence characteristics of dityrosine appeared in y -irradiated solutions of tyrosine, glycyl- L -tyrosine or polytyrosine (MW 110,000). The intensity of fluorescence was used for the determination of the dityrosine concentration in hydrolysed samples.
Grzegorz Boguta, Antoni M. Dancewicz
openaire +1 more source
Inhibition of tyrosine phenol-lyase by tyrosine homologues
Amino Acids, 2016We have designed, synthesized, and evaluated tyrosine homologues and their O-methyl derivatives as potential inhibitors for tyrosine phenol lyase (TPL, E.C. 4.1.99.2). Recently, we reported that homologues of tryptophan are potent inhibitors of tryptophan indole-lyase (tryptophanase, TIL, E.C.
Quang, Do +2 more
openaire +2 more sources