Molecular biology

Molecular biology

Contributors in Molecular biology

Molecular biology

A largely obsolete technique for measurement of respiration of tissue slices or other biochemical preparations. The volume of oxygen taken up is measured in a Warburg apparatus, a closed system that ...

Excision

Biology; Biochemistry

The removal of a section of double-stranded DNA that is faulty due to mutation or incorrect replication. The process includes incision, i.e. cleavage of the strand by an endonuclease and the action ...

Double sieve

Biology; Biochemistry

Descriptive of the mechanism for assuring correct charging of a tRNA by its amino acid activating enzyme. Only an amino acid that exactly fits the binding site will be ligated to the nucleic acid; ...

Secondary structure

Biology; Biochemistry

In protein chemistry, the regular folding of a polypeptide in a repeated pattern, e.g. α-helix, β-pleated sheet, β-turn; in nucleic acid chemistry by analogy, the double-helical structure of a ...

Coated region

Biology; Biochemistry

The region of the plasma membrane of a cell capable of endocytosis that contains receptors and is lined on the cytoplasmic side with the protein clathrin. When the receptors are occupied, these ...

Preproprotein

Biology; Biochemistry

The entire polypeptide that is encoded by an mRNA for a secretory protein before processing by proteinases cleaves the signal sequence and another polypeptide sequences that must be removed before ...

Repeat

Biology; Biochemistry

A feature of a helix; the distance parallel to the axis in which the backbone structure repeats itself. For a DNA double helix, for example, the repeat distance is 34 Ã (0.34 nm), which represents ...