| 单词 | pyrimidine |
| 例句 | Not only did we lack the purine and pyrimidine components, but we had never had the shop put together any phosphorus atoms. Double Helix 1968-02-27T00:00:00Z When he said no, my morale skyrocketed, for I suspected that we now had the answer to the riddle of why the number of purine residues exactly equaled the number of pyrimidine residues. Double Helix 1968-02-27T00:00:00Z Two irregular sequences of bases could be regularly packed in the center of a helix if a purine always hydrogen-bonded to a pyrimidine. Double Helix 1968-02-27T00:00:00Z Neither phosphorus atoms nor the purine and pyrimidine bases were on hand. Double Helix 1968-02-27T00:00:00Z The metal purine and pyrimidine models, needed for systematically checking all the conceivable hydrogen-bonding possibilities, had not been finished on time. Double Helix 1968-02-27T00:00:00Z This could only mean that the 3.4 A-thick purine and pyrimidine bases were stacked on top of each other in a direction perpendicular to the helical axis. Double Helix 1968-02-27T00:00:00Z Since the war, Chargaff and his students had been painstakingly analyzing various DNA samples for the relative proportions of their purine and pyrimidine bases. Double Helix 1968-02-27T00:00:00Z These bases form complementary base pairs consisting of one purine and one pyrimidine, with adenine pairing with thymine, and cytosine with guanine. Chemistry 2019-02-14T00:00:00Z This repair mechanism is often employed when UV exposure causes the formation of pyrimidine dimers. Biology for AP Courses 2022-06-09T00:00:00Z Olorofim, the compound Hoenigl is testing, is one example: It blocks the synthesis of pyrimidine, the precursor of DNA building blocks. Four new drugs may help fight the growing threat of fatal fungi 2019-10-22T04:00:00Z Targeting one carbon metabolism with an antimetabolite disrupts pyrimidine homeostasis and induces nucleotide overflow. Clonal evolution mechanisms in NT5C2 mutant-relapsed acute lymphoblastic leukaemia 2018-01-16T05:00:00Z Therefore, the immediate 3′ and 5′ nucleotides of all somatic SNVs were extracted from the reference genome and the obtained trinucleotides were converted to pyrimidine context resulting in 96 possible mutation types. The whole-genome landscape of medulloblastoma subtypes : Nature : Nature Research 2017-07-18T04:00:00Z Mice covered in both types of sunscreen were protected from key signs of UV damage called cyclobutane pyrimidine dimers, a “molecular signature” of sunburn. New nanoparticle sunblock is stronger and safer, scientists say 2015-09-28T04:00:00Z When individuals are exposed to UV, pyrimidine dimers, especially those of thymine, are formed; people with xeroderma pigmentosa are not able to repair the damage. Biology for AP Courses 2022-06-09T00:00:00Z In 2009, a team at the Novartis Institute for Tropical Diseases in Singapore landed on a new class of compound, pyrimidine–imidazoles, which killed M. tuberculosis in vitro but had no effect on infected mice. Drug development: A combined effort 2013-10-09T17:20:55.343Z These pathways function to excise and repair abnormal bases or nucleotides, such as deaminated cytosines or ultraviolet radiation induced pyrimidine dimers. The causes and consequences of genetic heterogeneity in cancer evolution 2013-09-18T17:22:16.487Z Despite its hydrolytic instability, that arsenate must be maintained for many steps as the purine and pyrimidine rings are forged. [Technical Comment] Comment on ?A Bacterium That Can Grow by Using Arsenic Instead of Phosphorus? 2011-06-02T18:25:14.937Z The nucleic acids are complex compounds consisting of a carbohydrate, phosphoric acid, two purine bases, and two pyrimidine bases. The Chemistry of Plant Life Base pairing takes place between a purine and pyrimidine; namely, A pairs with T and G pairs with C. Adenine and thymine are complementary base pairs, and cytosine and guanine are also complementary base pairs. Biology for AP Courses 2022-06-09T00:00:00Z From these results Funk believed the vitamine to belong to a class of substances known as the pyrimidine bases. The Vitamine Manual Transversion substitution refers to a purine being replaced by a pyrimidine, or vice versa; for example, cytosine, a pyrimidine, is replaced by adenine, a purine. Biology for AP Courses 2022-06-09T00:00:00Z A purine always pairs with a pyrimidine; A pairs with T, and G pairs with C. One turn of the helix has ten base pairs. Biology for AP Courses 2022-06-09T00:00:00Z Damage to DNA induced by ultraviolet radiation occurs with the formation of bonds between an adjacent pair of pyrimidine nucleotides, thymine and cytosine, on the same strand of DNA. Biology for AP Courses 2022-06-09T00:00:00Z Only the pairing between a purine and pyrimidine can explain the uniform diameter. Biology for AP Courses 2022-06-09T00:00:00Z The reports from Hofmeister are to the effect that he has isolated a very active solution belonging to the pyrimidine series. The Vitamine Manual For example, a certain purine can only pair with a certain pyrimidine. Biology for AP Courses 2022-06-09T00:00:00Z Bonds in the purine and pyrimidine rings of nucleic acids are broken by high-energy uv radiation. Biology for AP Courses 2022-06-09T00:00:00Z FUNK, C.: The action of certain purine and pyrimidine derivatives. The Vitamine Manual Transition substitution refers to a purine or pyrimidine being replaced by a base of the same kind; for example, a purine such as adenine may be replaced by the purine guanine. Biology for AP Courses 2022-06-09T00:00:00Z |
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