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a Related Biological Terms:

chelator

A compound that binds ions, especially metal ions, by several functional groups whose combined effect results in a high-affinity interaction.

chemical cleavage method

(= Maxam-Gilbert method (chemical cleavage method))

chemical coupling hypothesis

Explanation for oxidative phosphorylation by analogy with substrate-level phosphorylation, i.e. when a phosphate derivative of an electron carrier is oxidized, it becomes a high-energy phosphate compound, energetically capable of transferring its phosphate to ADP. (see also chemiosmotic theory; conformational hypothesis) Learn more about amino acid chart.

chemical force microscopy

A variant of atomic force microscopy in which the sensing probe is coated with a substance that interacts with the test material or object. Frisbe, C.D., Rozsnyai, L.F., Noy, A., et al. (1994) Science 265, 2071-2074

chemical mismatch detection

(= hydroxylamine and osmium tetroxide (HOT) technique (chemical mismatch detection))

chemical shift

In nuclear magnetic resonance, the modulation of field strength necessary to achieve the resonance frequency characteristic of a particular atom in a particular chemical, i.e. bonding, environment.

chemoattractant

(see also chemotaxis)

chemorepellant

(see chemotaxis)

chemotaxis

The movement of a cell along the concentration gradient of a chemical, the chemotactic agent, toward its source, in the case of the chemical being a chemoattractant, or away, in the case of a chemorepellant.Stock, A.M. and Mowbray, S.J. (1995) Curr. Opin. Struct. Biol. 5, 744-751

chiasma

The point of attachment of two chromatids during meiosis that results in crossing-over, which is the exchange of a region of one chromosome, from an end to the chiasma, with the homologous region of a sister chromosome.

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