Results 71 to 80 of about 33,942 (331)

EFFECTS OF CHANGES IN THE STRUCTURE OF ENKEPHALINS AND OF NARCOTIC ANALGESIC DRUGS ON THEIR INTERACTIONS WITH μ‐ AND δ‐RECEPTORS

open access: yes, 1980
1 The activity pattern of analogues of the enkephalins was determined in four parallel assays, the inhibition of the electrically evoked contraction of the guinea‐pig ileum and mouse vas deferens at 36°C and the inhibition of [3H]‐naltrexone and [3H ...
H. Kosterlitz   +3 more
semanticscholar   +1 more source

Chronic Morphine Treatment Modulates the Extracellular Levels of Endogenous Enkephalins in Rat Brain Structures Involved in Opiate Dependence: A Microdialysis Study

open access: yesJournal of Neuroscience, 2002
The endogenous opioid system is often assumed to play a role in vulnerability to drug abuse. However, controversial results have been reported regarding the levels of enkephalins or preproenkephalin in neurons of rodent brains after opiate administration.
M. Nieto   +4 more
semanticscholar   +1 more source

3,4,5‐Trifluorophenyldiazonium – a unique radical source for the visible light induced, catalyst‐free arylation of tyrosine residues in peptides

open access: yesChemistry – A European Journal, Accepted Article.
The direct radical arylation of tyrosine residues in peptides has been achieved under highly attractive conditions, requiring only the peptide substrate, a 3,4,5‐trifluorophenyldiazonium salt and irradiation with visible light. Being well‐balanced in its reactivity to form strong charge transfer complexes with the phenolic side chain, which are ...
Markus Rolf Heinrich   +5 more
wiley   +1 more source

Analgesia linked to Nav1.7 loss of function requires µ- and δ-opioid receptors [version 1; referees: 2 approved]

open access: yesWellcome Open Research, 2018
Background: Functional deletion of the Scn9a (sodium voltage-gated channel alpha subunit 9) gene encoding sodium channel Nav1.7 makes humans and mice pain-free. Opioid signalling contributes to this analgesic state.
Vanessa Pereira   +5 more
doaj   +1 more source

Expression of the Antimicrobial Peptide Piscidin 1 and Neuropeptides in Fish Gill and Skin: A Potential Participation in Neuro-Immune Interaction

open access: yesMarine Drugs, 2022
Antimicrobial peptides (AMPs) are found widespread in nature and possess antimicrobial and immunomodulatory activities. Due to their multifunctional properties, these peptides are a focus of growing body of interest and have been characterized in several
Giacomo Zaccone   +15 more
doaj   +1 more source

Comparative Study of Multicanonical and Simulated Annealing Algorithms in the Protein Folding Problem [PDF]

open access: yes, 1994
We compare a few variants of the recently proposed multicanonical method with the well known simulated annealing for the effectiveness in search of the energy global minimum of a biomolecular system. For this we study in detail Met-enkephalin, one of the simplest peptides.
arxiv   +1 more source

Rugged Metropolis Sampling with Simultaneous Updating of Two Dynamical Variables [PDF]

open access: yesPhys. Rev. E 72, 016712 (2005), 2005
The Rugged Metropolis (RM) algorithm is a biased updating scheme, which aims at directly hitting the most likely configurations in a rugged free energy landscape. Details of the one-variable (RM$_1$) implementation of this algorithm are presented. This is followed by an extension to simultaneous updating of two dynamical variables (RM$_2$).
arxiv   +1 more source

Bioanalytical applications of immobilized antibodies and enzymes [PDF]

open access: yes, 2022
Dissertation (Ph.D.)--University of Kansas, Chemistry ...
Hendrickson, Tina L.
core  

Enkephalins Are Transported by a Novel Eukaryotic Peptide Uptake System*

open access: yesJournal of Biological Chemistry, 2000
We have identified an oligopeptide transporter in the yeast Saccharomyces cerevisiae which mediates the uptake of tetra- and pentapeptides, including the endogenous opioids leucine enkephalin (Tyr-Gly-Gly-Phe-Leu) and methionine enkephalin (Tyr-Gly-Gly ...
M. Hauser   +4 more
semanticscholar   +1 more source

Neuropeptide Profiles of Mammalian Male Genital Tract: Distribution and Functional Relevance in Reproduction

open access: yesFrontiers in Veterinary Science, 2022
Neuropeptides are secretory peptides characterized by small chains of amino acids linked by peptide bonds. They are majorly found in some mammalian neurons and glial cells, where they modulate a variety of physiological homeostasis.
Jamiu O. Omirinde, Idris A. Azeez
doaj   +1 more source

Home - About - Disclaimer - Privacy