The Metric Structure of Nucleic Acids and the Higher Dimension of Their Constituents

Author(s):  
Gennadiy Vladimirovich Zhizhin

The purpose of the study is to build a metric model of the structure of a nucleic acid molecule, taking into account the higher dimension of its components, the actual lengths of chemical bonds, and the angles between them. Calculations by the constructed model showed the closeness of the known experimental characteristic parameters of the nucleic acid (helix diameter, period length) and the calculated values of these parameters. The internal degree of freedom of the nucleic acid molecule is revealed: the angle of rotation of the phosphoric acid residue relative to the chemical bond connecting it to the five-carbon sugar molecule. It is established that the value of this angle determines the shape of the nucleic acid molecule. It is claimed that the process of transmission of hereditary information and protein synthesis occurs in a space of high dimensionality in ribosomes.

2015 ◽  
Author(s):  
Dimitra Tsavachidou

Sequencing at single-nucleotide resolution using nanopore devices is performed with reported error rates 10.5-20.7% (Ip et al., 2015). Since errors occur randomly during sequencing, repeating the sequencing procedure for the same DNA strands several times can generate sequencing results based on consensus derived from replicate readings, thus reducing overall error rates. The method presented in this manuscript constructs copies of a nucleic acid molecule that are consecutively connected to the nucleic acid molecule. Such copies are useful because they can be sequenced by a nanopore device, enabling replicate reads, thus improving overall sequencing accuracy.


2020 ◽  
Vol 8 (4) ◽  
pp. 172-172
Author(s):  
Jane Hanley

In March it seemed not only surreal but impossible to comprehend that the coronavirus would ever venture near our shores – and yet here it is. Jane Hanley looks at the effects of the pandemic on the emotional wellbeing of parents and professionals alike


1967 ◽  
Vol 58 (1) ◽  
pp. 217-224 ◽  
Author(s):  
D. R. Mills ◽  
R. L. Peterson ◽  
S. Spiegelman

1950 ◽  
Vol 33 (3) ◽  
pp. 265-274 ◽  
Author(s):  
N. B. Kurnick ◽  
A. E. Mirsky

Study of the stoichiometry of the DNA-methyl green reaction by dialysis, precipitation of stain-nucleic acid mixtures, and the staining of nuclei of known DNA content, indicate that the compound consists of one dye molecule per 10 P. The significance of this result was discussed in the preceding paper (1). Histone and lanthanum (and probably other multivalent cations (3)) compete with the dye for the nucleic acid molecule, indicating a common site of attachment, presumably the phosphoric acid groups. With care in the avoidance of procedures which might depolymerize DNA, and the use of a buffer at about pH 4.1, a quantitative histochemical method for DNA by the use of methyl green is possible. Pyronin staining appears to be of qualitative significance only. Slight differences in degree of polymerization, as between the shad and mammalian DNA appear to have no effect on methyl green staining. It may be that a critical level of polymerization for DNA staining exists. This level must exceed 20 nucleotides to account for the 10 P to 1 dye molecule and the effect on the methyl green absorption spectrum; but it may be considerably greater. Beyond this critical level, whatever it may be, further polymerization probably has no influence on staining.


2007 ◽  
Vol 17 (5) ◽  
pp. 325-331 ◽  
Author(s):  
G. Grassi ◽  
R. Farra ◽  
E. Noro ◽  
D. Voinovich ◽  
R. Lapasin ◽  
...  

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