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生物英語論文の訳
下記の英文を訳してください。 1)We wish to suggest a structure for the salt of deoxyribose nucleic acid has already been proposed by Pauling and Copey.They kindly made their manuscript available to us in advance of publication.Their model consists of three inter-twind chains,with the phosphates near the fibreaxis,and the bases on the outside.In our opinion,this structure is unsatisfactory for two reasons:(1)We believe that the material which gives the X-ray diagrans is the salt,not the free acid.Without the acidic hydrogen atoms it is not clear what forces would hold the structure toegher,especially as the negatively charged phophates near the axis will repel each other.(2)Some of the van der Waals distances appear to be too small. 2)Another three-chain structure has also been suggested by Fraser(in the press).In his model the phophates are on the outside and the bases on the inside,linked together by hydrogen bonds.This atructure as described is rather ill-defined,and for this reason we shall not comment on it.
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短い方の２)だけ、(長い方を訳す気力が無い) 「他の三鎖構造がFraserによって示唆されている(印刷中)。そのモデルではリン酸基が外部に、塩基が内部に位置し水素結合で結ばれている。前記のような構造はかなり誤って定義され(or考えられ)ているので、ここではその構造については論じない。」 読んでみるとこれってワトソンとクリックの「古典」の一部のような気がしますね。 ポーリング先生の名前も出て来てすごく懐かしい。(感激) ポーリング先生達は塩基が外側に出ているモデルを考えていたんですね。
関連するQ&A
- 生物英語論文の訳
下記の英文を訳してください 1)We wish to suggest a structure for the salt of deoxyribose nucleic acid has already been proposed by Pauling and Copey.They kindly made their manuscript available to us in advance of publication.Their model consists of three inter-twind chains,with the phosphates near the fibreaxis,and the bases on the outside.In our opinion,this structure is unsatisfactory for two reasons:(1)We believe that the material which gives the X-ray diagrans is the salt,not the free acid.Without the acidic hydrogen atoms it is not clear what forces would hold the structure toegher,especially as the negatively charged phophates near the axis will repel each other.(2)Some of the van der Waals distances appear to be too small. 3)Another three-chain structure has also been suggested by Fraser(in the press).In his model the phophates are on the outside and the bases on the inside,linked together by hydrogen bonds.This atructure as described is rather ill-defined,and for this reason we shall not comment on it.
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- 英語
- 和訳してください!!(前半)
Molecular Structure Of Nucleic Acids A Structure for Deoxyribose Nucleic Acid We wish to suggest a structure for the salt of deoxyribose nucleic acid (D.N.A.). This structure has novel features which are of considerable biological interest. A structure for nucleic acid has already been proposed by Pauling and Corey (1). They kindly made their manuscript available to us in advance of publication. Their model consists of three intertwined chains, with the phosphates near the fibre axis, and the bases on the outside. In our opinion, this structure is unsatisfactory for two reasons: 1) We believe that the material which gives the X-ray diagrams is the salt, not the free acid. Without the acidic hydrogen atoms it is not clear what forces would hold the structure together, especially as the negatively charged phosphates near the axis will repel each other. 2) Some of the van der Waals distances appear to be too small. Another three-chain structure has also been suggested by Fraser (in the press). In his model the phosphates are on the outside and the bases on the inside, linked together by hydrogen bonds. This structure as described is rather ill-defined, and for this reason we shall not comment on it. We wish to put forward a radically different structure for the salt of deoxyribose nucleic acid. This structure has two helical chains each coiled round the same axis (see diagram). We have made the usual chemical assumptions, namely, that each chain consists of phosphate diester groups joining ß-D-deoxyribofuranose residues with 3',5' linkages. The two chains (but not their bases) are related by a dyad perpendicular to the fibre axis. Both chains follow right-handed helices, but owing to the dyad the sequences of the atoms in the two chains run in opposite directions. Each chain loosely resembles Furberg’s (2) model No. 1; that is, the bases are on the inside of the helix and the phosphates on the outside. The configuration of the sugar and the atoms near it is close to Furberg’s ‘standard configuration’, the sugar being roughly perpendicular to the attached base. There is a residue on each chain every 3.4 A. in the z-direction. We have assumed an angle of 36° between adjacent residues in the same chain, so that the structure repeats after 10 residues on each chain, that is, after 34 A. The distance of a phosphorus atom from the fibre axis is 10 A. As the phosphates are on the outside, cations have easy access to them. This figure is purely diagrammatic. The two ribbons symbolize the two phosphate-sugar chains, and the horizontal rods the pairs of bases holding the chains together. The vertical line marks the fibre axis.
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- 英語
- 生物論文の和訳
下記の論文を訳してください。 1)We wish to put forward a radically different structure for the salt of deoxyribose nucleic acid.This structure has two helical chains cach colied round the same axis(see diagram).We have made the usual chemical assumptions,namely,that each chain consists of phophates di-ester groups joining B-D-deoxy-ribofuranose residues with 3',5' linkages.The two chains (but not their bases) are related by a dyad perpendicular to the fibreaxis.Both chains follow right-handed helices,but owing to the dyad the sequences of the atoms in the two chains run in opposite directions.Each chains loosely resembles Fur-berg's model No.1 ; that is,the bases are on the inside of the helix and the phophates on the outside.The configuration of the sugar and the atoms near it is close to Furberg's 'standard configuration',the sugar being roughly perpendicular to the attached base.
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- 生物学
- 生物論文を和訳２
下記の英文を訳してください 1)There is a residue on each chain every 3・4 A.in the z-direc-tion.We have assumed an angle of 36゜ between structure repeats after 10 residues on each chain,that is,after 34 A. The distance of a phophates atom from the fibre axis is 10 A. As the phophates are on the outside,cations have easy access to them. 2)The structure is an open nne,and its water contents we would expect the bases to tilt so that the structure could become more compact. 3)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 bases from the other chain,so that the two lie side by side with identical z-co-ordinates.One of the pair must be a purine and the other a pyrimidine for bonding to occur.
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- 英語
- 生物論文の和訳
下記の論文を訳してください 2)The structure is an open nne,and its water contents we would expect the bases to tilt so that the structure could become more compact. 3)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 bases from the other chain,so that the two lie side by side with identical z-co-ordinates.One of the pair must be a purine and the other a pyrimidine for bonding to occur.
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- 英語
- 生物論文の訳
下記の英文を訳してください 1)The previously published X-gen data on deoxyribose nucleic acid are insufflcient for a rigorous test of our structure.So far as we can tell,it is roughly compatible with the experimental data,but it must be regarded as unproved until it has been checked against more exact results.Some of these are given in the following communications.We were not aware of the details of the results presented there when we devised our structure,which rests mainly though not entirely on published experimental data and stereo-chemical arguments.
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- 英語
- 生物 論文の和訳
下記の英文を和訳してください 1)In other words,if an adenine forms one member of a pair,on either chain,then on these assumptions the member must be thymine;similarly for guanine and cytosine.The sequences of bases on a single chain dose not appear to be restricted in any way.However,if only specific pairs of bases can be formed,it follows that if the sequence on the other chain is autmatically determined. 2)It has been found experimentally that the ratio of the amounts of adenine to thymine,and the ratio of guanine to cytosine,are always very close to unity for deoxyribose nucleic acid. 3)It is probably impossible to build this structure with a ribose sugar in plase of the deoxyribose,as the extra oxygen atom would make too close a vander Waals contact.
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- 英語
- 英語の生物の和訳です。
1.4 DNA structure and function DNA is huge ladder-like molecule made up of sugar , phosphate and four organic bases called Adenine, Guanine, Cytosine and Thymine.The bases will only join up in the pairs A to T and G to C. The two halves of the ladder can also un-zip between the pairs of bases.They do this: (a) At mitosis: each half ladder forms the other half on itself.So two ladders,which are identical, result.This is the reason why a chromosome that splits in mitosis forms two identical chromosomes. (b) When genes make proteins: each half ladder forms a related substance, RNA(very similar to DNA) on it.This then detaches, passing to the ribosomes.RNA carries the sequence of bases that were in the DNA.Each three letter ‘word’(triplet),e.g.AGC attracts particular amino acid to the ribosome. The sequence of the hundreds of triplets is what determines the kind of protein formed at the ribosomes-each protein has its own unique DNA sequence. Thus a length of DNA with its own unique sequence is a gene; and a gene is what is used to make its own, unique,protein by linking a particular sequence of amino acids together at ribosome. The‘ladder’structure of DNA is in fact turned into a spiral(double helix) thread,with 10 base pairs per complete 360°turn.This has little to do with the function of DNA but it was a crucial fact, discovered by Franklin, Wilkins, Watson and Crick, in determining its structure. かなり長いですがお願いします。 すごく急いでます。
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- 英語
- 生物論文を和訳3
下記の英文を訳してください 1) The hydrogen bonds are made as follows:purine position 1 to pyrimidine position 1; purine position 6 to pyrimidine position 6. 2)If it is assumed that the bases only occur in the structure in the most plausible tautmeric forms (that is,with the keto rather than the enol configurations)it is found that only specific pairs of bases can bond together.These pairs are:adenine(purine) with thymine(pyrimidine), and guanine(purine) with cytosine(pyrimidine).
- 締切済み
- 英語
- 生物論文の和訳
下記の論文を訳してください 1)There is a residue on each chain every 3・4 A.in the z-direc-tion.We have assumed an angle of 36゜ between structure repeats after 10 residues on each chain,that is,after 34 A. The distance of a phophates atom from the fibre axis is 10 A. As the phophates are on the outside,cations have easy access to them.
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- 英語
