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Showing 1 to 14 of 14 for “"Dihydroxyphenylalanine"”.
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Effects of the Administration of 5-Hydroxydl-Tryptophan and 3,4-Dihydroxyphenylalanine on the Acquisition of a Conditioned Avoidance Response
The administration of 3,4-dihydroxyphenylalanine (L-Dopa) has been shown to result in the facilitation of performance while the administration of 5-hydroxytryptophan (5-HTP) results in an impairment of performance and reported enhancement of acquisition. The purpose of the present study is to …
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Detection of Polypeptide Interactions Via Periodate Triggered Dopa Crosslinking
… oxidation of the artificial amino acid 3,4- Dihydroxyphenylalanine to a resultant ortho-quinone. This ortho-quinone was proven capable of capturing either cysteine, lysine, histidine, or a peptidyl alpha -amine in templated chemical reactions. After elucidating the chemistry, we describe …
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CHEMICAL INDUCTION OF SETTLEMENT IN LARVAE OF THE EASTERN OYSTER <italic>CRASSOSTREA VIRGINICA </italic> (GMELIN)
… 5-hydroxytryptamine, and L-3, 4-dihydroxyphenylalanine all at 10<super>-4</super>M, as well as ammonia as a solution of 7.9mM NH<sub>4</sub>Cl (pH=8.0). These findings differ somewhat from the results of similar studies involving other species in the <italic>Crassostrea</italic> …
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A Bio-Inspired Self-Healing Polymer System for Sustainable Plastics
… reducing plastic consumption. The amino acid 3,4-dihydroxyphenylalanine (DOPA) grants marine mussels the ability to strongly affix themselves to the rocks under water by forming strong reversible bonds with their environment. Poly[(3,4-dihydroxystyrene)-co-styrene)] (P[3,4-DHS-S]) is a synthetic …
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ENHANCING THE BONDING OF SYNTHETIC POLYMERS MIMICKING MARINE BIOADHESIVES
… contain a high amount of the amino acid, 3,4-dihydroxyphenylalanine (DOPA). This catechol moiety provides cross-linking chemistry that allows these animals to bond tightly to rocks and each other, even when wet. In developing synthetic mimics of mussel adhesive proteins, we are incorporating …
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Investigation of the mechanism of radical propagation in E. coli ribonucleotide reductase by site-specific incorporation of unnatural amino acids
… the basis of results with the radical traps 3,4-dihydroxyphenylalanine (DOPA) and 3-aminotyrosine (NH2Y), which we have incorporated into 32 and a2, respectively, and a series of fluorotyrosines (FnYs, n=2, 3, 4), which we have established as probes for proton-coupled electron transfer reactions …
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Development of Electrochemical Sensors Suitable for In Vivo Detection for Neurotransmitters
… species (ascorbic acid, uric acid, L 3,4 dihydroxyphenylalanine, homovanillic acid, 3 methoxytyramine and 5 hydroxyindoleacetic acid) has also been investigated for future in vivo applications. Selective detection of physiological concentrations of dopamine at the collector electrodes …
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The effects of neonatal/juvenile heat stress and varying L- tryptophan levels on growth parameters, meat quality, and brain neurotransmitter levels in turkeys
… regions analyzed while linear increases in L-dihydroxyphenylalanine (L·DOPA) occurred in all regions analyzed except for the cerebellum due to Lâ tryptophan supplementation. Plasma levels of serotonin also increased in a positive dose-response fashion while tryptophan supplementation at all …
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Biochemical Studies of Aromatic Amino Acid Decarboxylases and Acetaldehyde Synthases
… decarboxylase and acetaldehyde synthase. L-3, 4-dihydroxyphenylalanine (L-dopa) decarboxylase (DDC) is a model enzyme we use as a reference because the structures and functions of DDC are relatively well established. We previously identified two annotated DDC-like proteins from Drosophila indeed …
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Biochemical studies of enzymes in insect cuticle hardening
… the metabolic engineering work of L-3, 4-dihydroxyphenylalanine decarboxylase (DDC) and 3, 4-dihydroxylphenylacetaldehyde (DHPAA) synthase has revealed that the reactions of these enzymes could be determined by a few conserved residues at their active site. As both enzymes have been …
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Design, Synthesis and Application of Novel Degradable Materials Based on Polyesters by Radical Ring-Opening Polymerization
… chemistry in the future. We developed a 3,4-dihydroxyphenylalanine (DOPA) containing enzymatic degradable non-toxic synthetic adhesive with good adhesion to soft tissue and metals by a simple two-step reaction. This adhesive had degradable polycaprolactone- type repeating units together with …
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The role of protein metal complexes in the mechanics of Mytilus californianus byssal threads
… core of the byssal thread (Chapter 4) and L-3,4-dihydroxyphenylalanine (DOPA)-metal bonds in the protective thread cuticle (Chapter 5). Byssal threads are protein fibers, which mussels use to attach to various substrates at the seashore. These relatively stiff fibers have the ability to extend up …