(1968). Aspects of the electronic structure of the purine and pyrimidine bases of the nucleic acids and of their interactions. Advances in Quantum Chemistry, 4 , 267.PULLMAN, A. & PULLMAN, B. (1968). Aspects of the electronic structure of the purine and pyrimidine bases of the nucleic ...
A structure for nucleic acid has already been proposed by Pauling and Corey. They kindly made their manuscript available to us in advance of publication. Their model consists of three inter-twined chains, with the phosphates near the fibre axis, and the bases on the outside. In our opinion,...
What are pyrimidines in DNA? The pyrimidines found in DNA are Cytosine (C) and Thymine (T). They are capable of complimentary base pairing with the purines Guanine (G) and Adenine (A) to form a double helix. What are the three pyrimidine bases? Cytosine, thymine, and uracil are the...
The bases of each strand link together viahydrogen bonds. Adenine and Guanine are purines as they have two rings in their molecular structure. Thymine and Cytosine are pyrimidines as they only have one ring in their molecular structure. A purine will link with a pyrimidine. Adenine and thymine...
The novel feature of the structure is the manner in which the two chains are held together by the purine and pyrimidine bases. The planes of the bases are perpendicular to the fibre axis. They are joined together in pairs, a single base from one chain being hydrogen~bonded to a single ba...
Molecular structure of Nucleic acid沃森克里克威尔金斯1953年《Nature》737-740页
Novel Pyrimidine and Purine Derivatives of l-Ascorbic Acid: Synthesis and Biological Evaluation The novel pyrimidine derivatives 16 of 2,3-dibenzyl-4,5-didehydro-5,6-dideoxy-l-ascorbic acid were synthesized by the condensation of pyrimidine bases with... Silvana,Rai-Mali,Antonija,... - 《Journ...
Structure-antiviral activity relationship in the series of pyrimidine and purine N-[2-(2-phosphonomethoxy)ethyl] nucleotide analogues. 1. Derivatives substituted at the carbon atoms of the base. Holy A,Günter J,Dvoráková H,Masojídková M,Andrei G,Snoeck R,Balzarini J,De Clercq E. Journal...
One of the main consequences of the non-planar structure of bases is a comparatively large (approximately equal to 15 degrees) propeller twisting of purine and pyrimidine planes in the complementary adenine-thymine and guanine-cytosine pairs. It is concluded that the non-coplanarity of single ...
This allows clear distinction of purine and pyrimidines in double-nucleotide-type selective-labelled samples (for example, G,Ulab- or A,Ulab-RNAs). For the long-range carbon–carbon transfer, we tested different mixing sequences and finally settled on the PDSD (Proton-Driven-Spin-Diffusion) ...