过一个核苷酸的核糖都会跟后一个核苷酸中的磷酸根互相结合,键能比碱基对之间的连接要强很多。这种核苷酸之间上下连接的方式就会形成一个叫做糖-磷酸骨架的结构(sugar-phosphate backbone)。 DNA分子的尾部(磷酸的那一边)我们称之为5‘ end,头部(脱氧核糖的那一边)我们称之为3’ end。DNA的双链一条是从5‘端到3...
题目简述DNA结构。(DNA’s backbone) 相关知识点: 试题来源: 解析 DNA是以磷酸糖为骨架、由两条反方向平行的剪辑连组成的双螺旋结构。 DNA is a double helix made of two anti-parallel strands of bases on a sugar-phosphate backbone.反馈 收藏
Phosphate and sugar are linked together to make backbone and complementary bases are attached on it. 磷酸和糖连接在一起,形成主干,互补的碱基连接在上面。 Due to the bond angle of the sugar-phosphate molecules, the linkages will eventually form a double helix structure. 由于糖-磷酸分子的键角,最终...
The RNA primers are removed by another DNA polymerase, pol I, and the breaks in the sugar-phosphate backbone are sealed by DNA ligase. (b) A more realistic three-dimensional illustration.[Reproduced with permission from B. Alberts, DNA replication and recombination, Nature 421 (2003) 431–...
DNA, the abbreviation for Deoxyribonucleic Acid, consists of two antiparallel chains (double helix) consisting of sugar, a phosphate-unit and 4 different bases. The two chains are held together by hydrogen bonds between base pairs, while the sugar-phosphate backbone is on the outside. The sugar...
DNA和RNA两者都是核酸(长的生物大分子,由名为核甘酸(nucleotide)的较小分子所组成) 。 DNA是一个有两个核甘酸链的双链分子,由一个磷酸盐骨干(phosphate backbone)、去氧核糖(deoxyribose sugar)所组成,以及以腺嘌呤(adenine)、鸟嘌呤(guanine)、胞嘧啶(cytosine)和胸腺嘧啶(thymine)为主要成分。而RNA是一个单...
A., Sequence-Dependent DNA Structure: The Role of the Sugar-Phosphate Backbone. Journal of Molecular Biology 1998, 280 (3), 407- 420.Packer, M. J., Hunter, C. A. (1998) Sequence-dependent DNA Structure: The Role of the Sugar- phosphate Backbone, J. Mol. Biol. 280 (3): 407-420...
3. DndABCDE acts as the modification component to catalyze the sequence-specific oxygen-sulfur swap in the DNA sugar-phosphate backbone to generate double-stranded PT modifications4,5. PT is employed as the recognition tag by the restriction cognate DndFGH or PbeABCD to discriminate and destroy ...
Double-strand breaks can result from exposure to ionizing radiation, oxidative damage and the spontaneous cleavage of the sugar-phosphate backbone of the DNA molecule. Their repair can be effected by either rejoining the broken ends (left) or by homologous recombination with a sister DNA molecule ...
the sugar-phosphate backbone is replaced with a protein-like backbone. PNAs form P-loops while in...