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paba/harilik müürlook
Link salvestatakse lõikelauale
9 tulemused
The pab1 gene of Coprinus cinereus encodes a bifunctional protein for para-aminobenzoic acid (PABA) synthesis: implications for the evolution of fused PABA synthases.
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The pab1 gene of the basidiomycete Coprinus cinereus encodes PABA synthase, necessary for para-aminobenzoic acid production. The C. cinereus protein is bifunctional with an N-terminal glutamine amidotransferase domain and a C-terminal chorismate amination domain. In most bacteria, these two
Effects of humic acids, para-aminobenzoic acid and ascorbic acid on the N-nitrosation of the carbamate insecticide propoxur and on the mutagenicity of nitrosopropoxur.
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Nitrosation of the carbamate insecticide propoxur at pH 3 and 37 degrees C was determined colorimetrically and found to be time- and sodium nitrite concentration-dependent. Nitrosated propoxur was mutagenic when exposed to the seeds of the higher plant Arabidopsis thaliana but the formation of
Inhibitory effects of para-aminobenzoic acid on the formation and mutagenicity of N-nitroso compounds.
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Naturally occurring para-aminobenzoic acid (PABA) inhibited the formation of N-methyl-N-nitrosourea (MNU) from a nitrosation mixture of N-methylurea and nitrite at pH 3. The suppressive effect of PABA on the formation of MNU is higher than that of ascorbic acid. The presence of the MNU was assayed
Synthesis, crystal structure and biological activity of 2-hydroxyethylammonium salt of p-aminobenzoic acid.
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p-Aminobenzoic acid (pABA) plays important roles in a wide variety of metabolic processes. Herein we report the synthesis, theoretical calculations, crystallographic investigation, and in vitro determination of the biological activity and phytotoxicity of the pABA salt, 2-hydroxyethylammonium
Root Gravitropism Is Regulated by a Crosstalk between para-Aminobenzoic Acid, Ethylene, and Auxin.
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Plants respond to gravitational force through directional growth along the gravity vector. Although auxin is the central component of the root graviresponse, it works in concert with other plant hormones. Here, we show that the folate precursor para-aminobenzoic acid (PABA) is a key modulator of the
Arabidopsis dihydropteroate synthase: general properties and inhibition by reaction product and sulfonamides.
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Dihydropteroate synthase (DHPS) (EC 2.5.1.15) was extracted from leaves of Arabidopsis thaliana and purified 21-fold by ion-exchange chromatography. This enzyme preparation was then characterized for several of its properties. Michaelis-Menten constants for the substrates, p-aminobenzoic acid and
Sulfamethazine suppresses epigenetic silencing in Arabidopsis by impairing folate synthesis.
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DNA methylation is a critical, dynamically regulated epigenetic mark. Small chemicals can be valuable tools in probing cellular processes, but the set of chemicals with broad effects on epigenetic regulation is very limited. Using the Arabidopsis thaliana repressor of silencing1 mutant, in which
Differentiation of isomeric N-glycan structures by normal-phase liquid chromatography-MALDI-TOF/TOF tandem mass spectrometry.
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The detailed characterization of protein N-glycosylation is very demanding given the many different glycoforms and structural isomers that can exist on glycoproteins. Here we report a fast and sensitive method for the extensive structure elucidation of reducing-end labeled N-glycan mixtures using a
Volatile fatty acid-sensing system involving coenzyme-A transferase.
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On-site monitoring of volatile fatty acids (VFAs), such as propionate, is industrially and medically important. The present study developed a VFA biosensing system comprised of two recombinant enzymes, propionate coenzyme A (CoA) transferase (PCT) from Clostridium propionicum and acyl-CoA oxidase
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