Results 71 to 80 of about 27,209 (247)

Synthesis and enzymatic evaluation of the guanosine analogue 2-amino-6-mercapto-7-methylpurine ribonucleoside (MESG): insights into the phosphorolysis reaction mechanism based on the blueprint transition state: SN1 or SN2? [PDF]

open access: yes, 2010
A modified experimental procedure for the synthesis of MESG (2-amino-6-mercapto-7-methylpurine ribonucleoside) 1 has been successfully performed and its full characterization is presented.
Basso, Luiz A.   +8 more
core   +2 more sources

Insights into phosphate cooperativity and influence of substrate modifications on binding and catalysis of hexameric purine nucleoside phosphorylases. [PDF]

open access: yesPLoS ONE, 2012
The hexameric purine nucleoside phosphorylase from Bacillus subtilis (BsPNP233) displays great potential to produce nucleoside analogues in industry and can be exploited in the development of new anti-tumor gene therapies.
Priscila O de Giuseppe   +5 more
doaj   +1 more source

Mycoplasmas and cancer [PDF]

open access: yes, 2014
The standard of care for patients suffering cancer often includes treatment with nucleoside analogues (NAs). NAs are internalized by cell-specific nucleobase/nucleoside transporters and, after enzymatic activation (often one or more phosphorylation steps)
Balzarini, Jan   +2 more
core  

Pinpointing dynamic coupling in enzymes for efficient drug design [PDF]

open access: yes, 2016
Enzymes are proteins that catalyze almost every chemical reaction in living systems, achieving rate enhancements of up to 21 orders of magnitude relative to the uncatalyzed reactions.
Glasstone S, Haldane JBS, Polanyi M
core   +1 more source

Immunocompromised Status Definition in Observational Studies Using Electronic Health Records: A Scoping Review and a Proposal for a Phenotype Identification Algorithm

open access: yesPharmacoepidemiology and Drug Safety, Volume 35, Issue 4, April 2026.
ABSTRACT Immunocompromised individuals experience an impaired immune function due to conditions that might be either congenital or acquired over the course of their lives. Epidemiological studies often rely on clinical definitions which, in some cases, benefit from being translated into machine‐readable algorithms for application to electronic health ...
Judit Riera‐Arnau   +62 more
wiley   +1 more source

A Simple Method for RNA‐Seq of Manually Isolated Chromatophores in Oryzias Fishes

open access: yesDevelopment, Growth &Differentiation, Volume 68, Issue 3, April 2026.
ABSTRACT RNA sequencing (RNA‐seq) has become an essential tool for analyzing gene expression and exploring cell type–specific transcriptomes. However, sample preparation and quality control remain challenging, as current approaches typically rely on dissecting tissues containing mixed cell populations or using flow cytometry to isolate fluorescently ...
Makoto Goda   +11 more
wiley   +1 more source

The cytokinesis regulator RacGAP1 is a Rac1‐specific GAP on membranes

open access: yesProtein Science, Volume 35, Issue 3, March 2026.
Abstract Rho family small GTPases are essential for cytokinesis completion. RacGAP1, a dimeric multidomain protein with a lipid‐binding C1 domain and a GTPase‐activating protein (GAP) domain, is a major regulator in this process. However, despite many cellular and biochemical studies, whether RhoA or Rac1 is the actual substrate inactivated by RacGAP1 ...
Pavlina Dubois   +5 more
wiley   +1 more source

Tri-Cyclic Nucleobase Analogs and Their Ribosides as Substrates of Purine-Nucleoside Phosphorylases. II Guanine and Isoguanine Derivatives

open access: yesMolecules, 2019
Etheno-derivatives of guanine, O6-methylguanine, and isoguanine were prepared and purified using standard methods. The title compounds were examined as potential substrates of purine-nucleoside phosphorylases from various sources in the reverse ...
Alicja Stachelska-Wierzchowska   +4 more
doaj   +1 more source

Proteomic alterations of Escherichia coli by paraquat [PDF]

open access: yes, 2010
Paraquat (PQ; a widely used herbicide) exerts its harmful effect to human, mammals and microorganisms upon intracellular conversion to superoxide radical.
Isarankura-Na-Ayudhya, Chartchalerm   +7 more
core  

Global transcriptome response in during growth on ribose [PDF]

open access: yes, 2011
Background Lactobacillus sakei is valuable in the fermentation of meat products and exhibits properties that allow for better preservation of meat and fish. On these substrates, glucose and ribose are the main carbon sources available for growth. We used
Naterstad Kristine   +3 more
core   +2 more sources

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