Results 151 to 160 of about 15,390,687 (342)

The possibility of the nuclear magnetic resonance methods using for reference standards certification

Стандартные образцы, 2017
The article describes the uncertainty sources for the main stages of quantitative measurements by NMR method. It is shown that the NMR method is effective for measuring of the components molar ratio, the components relative weight portion and the ...
N. E. Kuzmina, S. V. Moiseev, V. A. Yashkir, E. V. Osintseva   +3 more
doaj  

A method to validate viral copy-number assay involving a hybrid amplicon and duplex droplet digital PCR

Molecular Therapy: Methods & Clinical Development
Viral copy-number (VCN) assay is a powerful, effective method to quantify toxicity, cellular kinetics, and durability of virus-modified cell therapy products. The qualification and validation of assay requires reference control.
Raymond Wu, Frank Luh, Soo-Mi Kweon, Yun Yen   +3 more
doaj   +1 more source

Substrate specificity of Burkholderia pseudomallei multidrug transporters is influenced by the hydrophilic patch in the substrate‐binding pocket

FEBS Letters, EarlyView.
Multidrug transporters BpeB and BpeF from the Gram‐negative pathogen Burkholderia pseudomallei have a hydrophilic patch in their substrate‐binding pocket. Drug susceptibility tests and growth curve analyses using an Escherichia coli recombinant expression system revealed that the hydrophilic patches of BpeB and BpeF are involved in the substrate ...
Ui Okada, Satoshi Murakami
wiley   +1 more source

Time after time – circadian clocks through the lens of oscillator theory

FEBS Letters, EarlyView.
Oscillator theory bridges physics and circadian biology. Damped oscillators require external drivers, while limit cycles emerge from delayed feedback and nonlinearities. Coupling enables tissue‐level coherence, and entrainment aligns internal clocks with environmental cues.
Marta del Olmo, Carolin Ector, Hanspeter Herzel   +2 more
wiley   +1 more source

Multiple ETS family transcription factors bind mutant p53 via distinct interaction regions

FEBS Letters, EarlyView.
Mutant p53 gain‐of‐function is thought to be mediated by interaction with other transcription factors. We identify multiple ETS transcription factors that can bind mutant p53 and found that this interaction can be promoted by a PXXPP motif. ETS proteins that strongly bound mutant p53 were upregulated in ovarian cancer compared to ETS proteins that ...
Stephanie A. Metcalf, Nicholas F. Downing, Kaitlyn M. Mills, Samuel C. Metcalfe, Alexander E. Kritzer, Lindsey D. Mayo, Peter C. Hollenhorst   +6 more
wiley   +1 more source

Standardization of the peptide preparation timocin

Регуляторные исследования и экспертиза лекарственных средств, 2018
It is currently established that some low molecular weight peptides possess immunomodulating activity and are used as peptide preparations. One of the most important trace elements playing an important role in the functioning of the immune system is zinc.
G. M. Bobizoda, N. D. Bunyatyan, A. N. Shakhmatov   +2 more
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In situ molecular organization and heterogeneity of the Legionella Dot/Icm T4SS

FEBS Letters, EarlyView.
We present a nearly complete in situ model of the Legionella Dot/Icm type IV secretion system, revealing its central secretion channel and identifying new components. Using cryo‐electron tomography with AI‐based modeling, our work highlights the structure, variability, and mechanism of this complex nanomachine, advancing understanding of bacterial ...
Przemysław Dutka, Yuxi Liu, Stefano Maggi, Debnath Ghosal, Jue Wang, Prashant P. Damke, Stephen D. Carter, Wei Zhao, Sukhithasri Vijayrajratnam, Joseph P. Vogel, Carrie L. Shaffer, Grant J. Jensen   +11 more
wiley   +1 more source

Sequence determinants of RNA G‐quadruplex unfolding by Arg‐rich regions

FEBS Letters, EarlyView.
We show that Arg‐rich peptides selectively unfold RNA G‐quadruplexes, but not RNA stem‐loops or DNA/RNA duplexes. This length‐dependent activity is inhibited by acidic residues and is conserved among SR and SR‐related proteins (SRSF1, SRSF3, SRSF9, U1‐70K, and U2AF1).
Naiduwadura Ivon Upekala De Silva, Puspa Kunwar, Md Ibnul Rifat Rahman, Joanna Koryo Kwao, Nathan Lehman, Zihan Zhang, Trenton Paul, Claire Cheng, Nicholas Truex, Hui‐Ting Lee, Jun Zhang   +10 more
wiley   +1 more source

Structural instability impairs function of the UDP‐xylose synthase 1 Ile181Asn variant associated with short‐stature genetic syndrome in humans

FEBS Letters, EarlyView.
The Ile181Asn variant of human UDP‐xylose synthase (hUXS1), associated with a short‐stature genetic syndrome, has previously been reported as inactive. Our findings demonstrate that Ile181Asn‐hUXS1 retains catalytic activity similar to the wild‐type but exhibits reduced stability, a looser oligomeric state, and an increased tendency to precipitate ...
Tuo Li, Pedro A. Sánchez‐Murcia, Bernd Nidetzky   +2 more
wiley   +1 more source

Theoretical rationale for the choice of interferon alfa-2b substance to be certified as a reference standard for identification test by peptide mapping

Биопрепараты: Профилактика, диагностика, лечение, 2018
The article provides with the results of theoretical research on justification of the choice of methionine form of recombinant interferon alfa-2b substance to be certified as a reference standard for identification test by peptide mapping. At present non-
O. B. Ustinnikova, O. B. Runova, E. O. Goloschapova, L. V. Korsun   +3 more
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