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denaturation

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ascorbic acid oxidase

Overview page. Subjects: Medicine and Health.

An enzyme in plant tissues that oxidizes ascorbic acid to dehydro-ascorbic acid; it is released only when the plant wilts or is cut. To preserve the vitamin in cooked vegetables, it is...

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avidin

Overview page. Subjects: Medicine and Health — Science and Mathematics.

A protein (152 aa) from egg white that binds biotin with very high affinity and can potentially cause biotin deficiency. The strength of the interaction is often used experimentally, e.g....

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coagulation

Overview page. Subjects: Medicine and Health — Science and Mathematics.

n. the process by which a colloidal liquid changes to a jelly-like mass. See blood coagulation.

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enzyme

Overview page. Subjects: Science and Mathematics — Medicine and Health.

A protein that acts as a catalyst, speeding up the rate at which a biological reaction takes place but without itself being changed or destroyed in the reaction.

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helix-to-coil transition

Overview page. Subjects: Chemistry.

The transition of a macromolecule (polypeptide or polynucleotide) from an ordered to a disordered structure; it is equivalent to denaturation. Helix‐to‐coil transitions are usually detected...

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melting temperature

Overview page. Subjects: Chemistry.

The temperature at which 50% of the double helices have denatured; the midpoint of the temperature range over which DNA is denatured. See denaturation, Tm.

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Q10

Overview page. Subjects: Plant Sciences and Forestry — Medicine and Health.

Temperature coefficient; the increase in a reaction or other process (expressed as a multiple of the initial rate) produced by raising the temperature 10°C.

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refolding

Overview page. Subjects: Chemistry.

(for proteins) the restoration of 3‐D structure in a manner that may or may not achieve a full return to the native state following denaturation.

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thermal denaturation profile

Overview page. Subjects: Chemistry.

A curve relating some physical property of a biopolymer in solution (e.g. viscosity, optical absorbance, or optical rotation) to temperature. The shape of the curve indicates the occurrence...

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trypsin inhibitor

Overview page. Subjects: Medicine and Health — Chemistry.

Any naturally occurring substance that inhibits the activity of trypsin. See pancreatic trypsin inhibitor, soybean trypsin inhibitor.

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