Results 81 to 90 of about 126,321 (267)

Structural analysis of the NifL‐NifA complex reveals the molecular basis of anti‐activation of nitrogen fixation gene expression in Azotobacter vinelandii

The FEBS Journal, EarlyView.
Using cryo‐EM combined with biochemical and genetic approaches, we mapped the interaction surface between NifL and NifA to gain insights into the regulation of nitrogen fixation genes in A. vinelandii. Our findings suggest that NifL, a homolog of histidine kinases lacking phosphorylation activity, evolved to act as a steric block of NifA activity ...
Marcelo Bueno Batista, Jake Richardson, Michael W. Webster, Dmitry Ghilarov, John W. Peters, David M. Lawson, Ray Dixon   +6 more
wiley   +1 more source

Affinity chromatography using 2′ fluoro-substituted RNAs for detection of RNA-protein interactions in RNase-rich or RNase-treated extracts

BioTechniques, 2009
Use of RNA affinity chromatography is commonly used to identify RNA binding proteins that interact with specific RNA cis-elements that function in post-transcriptional gene regulation.
Ruben H. Hovhannisyan, Russ P. Carstens
doaj   +1 more source

Feeding behavior in juvenile snook, Centropomus undecimalis. I. Individual effect of some chemical substances [PDF]

, 2012
This study was designed to analyze the influence of certain chemical substances on the feeding behavior of juvenile common snook. The following chemicals were tested: L-alanine, L-leucine, L-isoleucine, L-glutamic acid, glycine, L-proline, L-histidine, L-

core   +1 more source

An OGT Missense Variant With Impaired Enzyme Activity in a Child With Severe Developmental Delay and Hepatoblastoma

American Journal of Medical Genetics Part A, Volume 200, Issue 2, Page 502-510, February 2026.
ABSTRACT O‐GlcNAc transferase (OGT) and its antagonist O‐GlcNAcase (OGA) regulate protein O‐GlcNAcylation, a highly conserved post‐translational modification involved in metabolic sensing. Pathogenic variants in the OGT gene cause an X‐linked congenital disorder of glycosylation (OGT‐CDG) presenting developmental delay, hypotonia, intellectual ...
Alfonso Manuel D'Alessio, Huijie Yuan, Leandro Raul Soria, Sara Basse Hansen, Iolanda Boffa, Paola Arena, Benedetta Attianese, Maureen. O'Sullivan, Noelle Cullinan, Lewis Pang, Daan Marinus Ferdinand van Aalten, Nicola Brunetti‐Pierri, Sally Ann Lynch   +12 more
wiley   +1 more source

Failure of dideoxynucleosides to inhibit human immunodeficiency virus replication in cultured human macrophages. [PDF]

, 1987
Primary human monocyte-derived macrophages (MDM) were shown to have diminished deoxynucleoside kinase activities compared to T lymphoblasts, and a reduced ability to phosphorylate dideoxynucleosides with anti-human immunodeficiency virus (HIV) activity ...
Carson, DA, Kornbluth, RS, Richman, DD
core  

Identification of atropine-and P2X1 receptor antagonist-reistant, neurogenic contractions of the urinary bladder [PDF]

, 2007
Acetylcholine and ATP are excitatory cotransmitters in parasympathetic nerves. We used P2X1 receptor antagonists to further characterize the purinergic component of neurotransmission in isolated detrusor muscle of guinea pig urinary bladder.
Gallagher, Gemma, Kennedy, Charles, Tasker, Paul N., Westfall, Timothy D.   +3 more
core   +1 more source

Adenosine Triphosphate: Uridine Monophosphate-Cytidine Monophosphate Phosphotransferase from Tetrahymena pyriformis

Journal of Biological Chemistry, 1969
Abstract An enzyme that synthesizes uridine diphosphate from uridine monophosphate and adenosine triphosphate has been purified 300-fold from Tetrahymena pyriformis. The enzyme also converts cytidine monophosphate to cytidine diphosphate and deoxycytidine monophosphate to deoxycytidine diphosphate.
B W, Ruffner, E P, Anderson
openaire   +2 more sources

Combining Correlative Cryogenic Fluorescence and Electron Microscopy and Correlative Cryogenic Super‐Resolution Fluorescence and X‐Ray Tomography—Novel Complementary 3D Cryo‐Microscopy Across Scales to Reveal Nanoparticle Internalization Into Cancer Cells

Microscopy Research and Technique, Volume 89, Issue 2, Page 260-272, February 2026.
A newly established 3D correlative cryogenic fluorescence microscopy, focused ion beam scanning electron microscopy, and soft x‐ray tomography workflow allowed for enough contrast and resolution to quantify the intracellular uptake of zirconyl‐containing inorganic–organic hybrid nanoparticles as a novel chemotherapeutic drug delivery system into ...
Pavitra Sokke Rudraiah, Louisa Herbsleb, Michaela Salakova, Henriette Gröger, Anna Maria Steyer, Frauke Alves, Claus Feldmann, Andreas Walter   +7 more
wiley   +1 more source

Optimization of an in vitro transcription/translation system based on Sulfolobus solfataricus cell lysate. [PDF]

, 2018
A system is described which permits the efficient synthesis of proteins in vitro at high temperature. It is based on the use of an unfractionated cell lysate (S30) from Sulfolobus solfataricus previously well characterized in our laboratory for ...
Anna La Teana,, Benelli, Dario, Giuseppe, Perugino, LO GULLO, Giada, Londei, Paola, Rosanna, Mattossovich   +5 more
core   +2 more sources

RNA‐Lebendzellmikroskopie via click‐funktionalisierter TriPPPro Nucleotid‐Reporter

Angewandte Chemie, Volume 138, Issue 2, 9 January 2026.
Die intrazelluläre Zufuhr von trans‐Cycloocten und Bicyclo[6.1.0]nonin als sterisch anspruchsvolle Gruppen für die Diels–Alder‐Reaktion mit inversem Elektronenbedarf wurde durch die Triphosphat‐Prodrug‐Strategie (TriPPPro) erreicht. Nach der Hydrolyse innerhalb der Zelle werden die modifizierten Uridine und Cytidine metabolisch in die neu entstehende ...
J. Iven H. Knaack, Eileen List, Dörte Stalling, Vincente T. Sterrenberg, Chris Meier, Hans‐Achim Wagenknecht, Jens B. Bosse   +6 more
wiley   +1 more source