| This is the enzyme responsible for converting adenosine to inosine in the catabolism of the purines. |
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| This view was reinforced by the elucidation of Z DNA and Z RNA structures, where the syn purines are mostly guanines. |
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| In comparison with the deamination of cytosine to uracil, the deamination of DNA purines is a minor reaction. |
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| That is why researchers in Japan are now studying the choice of basic ingredients that are low in purines. |
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| Depending on the legume species, fixed nitrogen is exported as either amides or ureides, which are initially derived from the oxidative breakdown of purines. |
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| Reducing the pollution that this waste produces, especially purines, by means of agreements with the sector. |
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| Indeed, all the genes encoding enzymes required for de novo AMP biosynthesis are repressed at the transcriptional level by the presence of extracellular purines. |
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| Left-handed Z-DNA forms most readily in strands that contain sequences with alternating purines and pyrimidines. |
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| Must we be careful with beer because of the possible negative effects of the purines? |
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| However, Tuna's only drawback is for those who suffer from hyperuricemia or gout due to its content of purines which is transformed into uric acid by the body. |
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| More significantly, thioguanine enters rapidly into the anabolic and catabolic pathways for purines, and the active intracellular metabolites have appreciably longer half-lives than the parent drug. |
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| For example, an enzyme called nucleoside phosphorylase serves this role when cells switch to synthesizing nucleotides from recycled purines instead of from new starting materials. |
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| Evaluate the effectiveness of various low-risk products for use in phytoprotection, including hydrogen peroxide, sodium bicarbonate, vegetable purines and compost extracts. |
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| Ethyl acetoacetate readily enters into condensation reactions, and it has been employed in the synthesis of pyridines, quinolines, furans, pyrazoles, pyrroles, and purines. |
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| The majority of purines are endogenous, while diet is a source of exogenous purines. |
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| Beer is very bad as it's high in purines, which increase the amount of uric acid. |
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| Finally, but this was in 2002, perhaps before the results of the American study, it was said that the purines contained in beer do not have proven effects on the probability of having gout. |
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| He further reasoned that one way this might be done is with a drug that binds to a cell's purine receptors, so that they cannot react when purines come along. |
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| Uric acid is a product of the breakdown of purines, compounds that are essential components of DNA and RNA and of many biosynthetic reactions and that are normally steadily excreted into the urine. |
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| However, according to professor Denis De Keukeleire from the Pharmacology Department of the University of Ghent, the concentrations of purines in beer are relatively low. |
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| The amount of microbial purines absorbed was estimated from the excretion of total purines, using the equation proposed by Belenguer et al. |
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| Analysis of purines and pyrimidines in blood, urine, and other physiological fluids. |
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| It serves as a building block for the synthesis of purines, pyrimidines and many amino acids and lipids and is a key molecule in one-carbon metabolism. |
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| When I was first exposed to biochemistry, only a number of small biological building blocks, such as sugars, amino acids, purines, pyrimidines, fatty acids, and a few others, had been identified. |
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| The CDR makes cells put their ordinary activities on hold and instead switch on their defence systems, in reaction to high levels in the bloodstream of chemicals called purines. |
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| Purines in the body do not all originate from beer: the daily diet is also involved, as is lifestyle, perhaps stress, while purines also belong to the decomposition products of the cell metabolism in the body. |
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| Here, purines form hydrogen bonds to pyrimidines, with adenine bonding only to thymine in two hydrogen bonds, and cytosine bonding only to guanine in three hydrogen bonds. |
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| Leucophores, usually located deeper in the skin than iridophores, are also structural reflectors utilizing crystalline purines, often guanine, to reflect light. |
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| Both mutant strains showed similar growth profiles, displaying higher growth on purines, intermediates of the urea cycle and of the tricarboxylic acid cycle. |
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| Folates are single carbon donors for the synthesis of purines, pyrimidines, and methionine and hence critical for DNA synthesis and cellular function. |
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| Purines and pyrimidines are considered as complex molecules themselves because they are never synthesized as such in vivo. |
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| Purines are found naturally in the body, but they are also in some foods and in alcohol. |
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| Purines and pyrimidines serve as precursor molecules for DNA and RNA, as energy storage depots, as metabolic regulators, and as intermediates in biosynthetic pathways. |
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