Molecular biology

Molecular biology

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Molecular biology

Glycolipid

Biology; Biochemistry

A compound with both lipid and sugar moieties, e.g. lipopolysaccharide of Gram-negative bacteria cell walls, blood group antigens, gangliosides (carbohydrate moieties attached to N-fatty ...

A compound with more than one amino group that often contains short chains of carbon atoms separated by a nitrogen atom and forms a secondary amine; associated in the cell with nucleic acids; e.g. ...

Natural selection

Biology; Biochemistry

A hypothetical explanation of evolution, that successful organisms, over time, will crowd out and displace less successful ones, or will be better adapted to different niches and, over time and by ...

Twisting number (T)

Biology; Biochemistry

A topological property of double-stranded DNA; the number of turns one DNA strand makes around the other; the number of paired bases in a DNA molecule divided by 10; equal to the linking number minus ...

Rescue

Biology; Biochemistry

A strategy in chemotherapy in which lethal doses of an antifolate are given to block nucleotide biosynthesis in rapidly proliferating cells, followed by treatment with 5-formyltetrahydrofolate or ...

Colloid

Biology; Biochemistry

A dispersion of a high-molecular-mass solute in a liquid phase. Typically, the colloidal solute is unable to traverse a semi-permeable membrane. The solute particles are usually of sufficient size to ...

Reporter group

Biology; Biochemistry

A chromophore or fluorophore that is sensitive to its environment; a group added to a protein to indicate changes in its environment as the protein is manipulated, e.g. by denaturation or association ...