Molecular biology

Molecular biology

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Molecular biology

Balanced polymorphism

Biology; Biochemistry

The result of selective pressures for and against a deleterious mutation that permits it to persist in a population. An example is the stable presence in Africa of the sickle cell gene due to the ...

Correlation time

Biology; Biochemistry

In electron spin resonance and nuclear magnetic resonance spectroscopy, a time constant for the interaction of an observed species with its environment, often related to the rate of decay of its ...

Chair form

Biology; Biochemistry

A conformation of a six-membered non-aromatic ring that places all opposing centres away from each other, as contrasted with the boat form, which places two of the opposing centres towards each ...

Glycoform

Biology; Biochemistry

One of several variants of a glycoprotein that have identical polypeptide moieties but differ in the site of glycosylation (site heterogeneity) and/or the nature of the oligosaccharide moiety. ...

One of a class of genes that are capable of moving spontaneously from one chromosome to another, or from one position to another in the same chromosome; also known as a jumping gene or a transposable ...

Attenuation

Biology; Biochemistry

The response of the synthesis of bacterial mRNA to the nutritional state of the organism, e.g. the decrease in transcription of the trp operon in the presence of tryptophan, which is due to the ...

Nitrogen balance

Biology; Biochemistry

The quantitative difference between the intake of all nitrogenous products in the diet and the excretion of all nitrogenous products (both expressed in terms of g of nitrogen); positive nitrogen ...