نتایج جستجو برای: tar and ur
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Dr. Hans Mol is senior scientist at RIKILTWageningen UR Introduction Regulatory authorities throughout the world set and enforce strict limits on the maximum residue levels (MRLs or tolerances) of pesticides permitted on food and feeds. It falls to analytical laboratories to test these products and ensure they meet the relevant standards. The analytical challenge is to look for over 1,500 poten...
Human immunodeficiency virus, type 1 (HIV-1), Tat activates elongation of RNA polymerase II transcription at the HIV-1 promoter through interaction with the cyclin T1 (CycT1) subunit of the positive transcription elongation factor complex, P-TEFb. Binding of Tat to CycT1 induces cooperative binding of the P-TEFb complex onto nascent HIV-1 TAR RNA. Here the specific interaction between Tat prote...
tat, the trans-activator protein for human immunodeficiency virus 1 (HIV-1), has been expressed in Escherichia coli from synthetic genes. Purified tat binds specifically to HIV-1 trans-activation-responsive region (TAR) RNA in gel-retardation, filter-binding, and immunoprecipitation assays. tat does not bind detectably to antisense TAR RNA sequences, cellular mRNA sequences, variant TAR RNA seq...
Background We aimed to provide the first comprehensive estimates of the burden of group B Streptococcus (GBS), including invasive disease in pregnant and postpartum women, fetal infection/stillbirth, and infants. Intrapartum antibiotic prophylaxis is the current mainstay of prevention, reducing early-onset infant disease in high-income contexts. Maternal GBS vaccines are in development. Metho...
A series of neomycin dimers have been synthesized using "click chemistry" with varying functionality and length in the linker region to target the human immunodeficiency virus type 1 (HIV-1) TAR RNA region of the HIV virus. The TAR (Trans-Activation Responsive) RNA region, a 59 bp stem-loop structure located at the 5'-end of all nascent viral transcripts, interacts with its target, a key regula...
Uncaria rhynchophylla (UR), which is a traditional Chinese medicine, has anticonvulsive effect in our previous studies, and the cellular mechanisms behind this are still little known. Because of this, we wanted to determine the importance of the role of UR on kainic acid- (KA-) induced epilepsy. Oral UR for 6 weeks can successfully attenuate the onset of epileptic seizure in animal tests. Hippo...
Short basic peptides from the HIV Tat protein bind specifically to a bulge region in TAR RNA, with a single arginine residue providing the only sequence-specific contact. The free amino acid arginine also binds specifically to TAR. Previous circular dichroism (CD) experiments suggested that peptide binding induces a conformational change in TAR. Here we confirm this observation using single arg...
School of Chemistry, University of Bristol, C Microbiology Department, Faculty of Pharm UMR1345, IRHS-INRA, 49071 Beaucouzé C Institute for Organic Chemistry, Leibniz U 30167, Hannover, Germany. E-mail: russell. UMR BGPI, CIRAD, Campus International d France UR 1290 BIOGER-CPP, INRA, Campus A France UMR 5240 MAP, CNRS, UCB, INSA, Bayer C School of Biological Sciences, University o 1TQ, UK † Ele...
L-Tartrate ions can endure hydrothermal conditions up to 160 degrees C to form the robust, enantiopure open-framework coordination polymers [Ln2(L-TAR)3(H2O)2]3H2O, 1; the addition of succinate results in formation of the related [Ln2(L-TAR)2(SUC)(H2O)2]5.5H2O, with larger channels than , whereas racemic D/L-tartrate gives the more condensed [Ln2(D/L-TAR)3(H2O)2], . TAR = [C4H4O6]2-.
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