Dictionary » D » Denatured

Denatured

Definition

adjective

(1) Having been altered in natural quality.

(2) Of, or pertaining to, a molecule (such as a protein or a nucleic acid) wherein its chemical structure is altered through chemical or physical means so that some of its original properties are lost or diminished.

(3) Of, or pertaining to, a food or drink (often an alcohol) that is made unfit for human consumption (in case of alcohol, by the addition of methanol) while its use for other purposes is retained.


Supplement

A protein that is said to be denatured means that its tertiary structure is caused to unfold possibly by heat, alkali, acid, or by other chemical or physical means, making the molecule lose its original state and become biologically inactive.

A denatured nucleic acid such as DNA means that the paired strands have become separated into individual strands.

A denatured alcohol (ethanol) does not mean its structure is changed. It only means that its feature as a beverage has been removed by adding toxic and bitter tasting chemicals. That is why it is still useful for other purposes, such as a solvent.


Word origin: Latin -, (away from, of, out of) + nature(d).

Related term: denaturation


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Results from our forum


Extracting proteins from foliage

In such case it shouldn't matter, whether will they be denatured, should it? But anyway, I would precipitate them in such case, because you've had to adjust the pH and adding unnecessary chemicals to feed stock is not good. If you have access to some ...

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by JackBean
Mon May 14, 2012 6:03 am
 
Forum: Botany Discussion
Topic: Extracting proteins from foliage
Replies: 4
Views: 2248

Digestive Enzymes and cooking temperatures

... 60°C will denature most of the proteins. Your granola bars are baked at much higher temperature (see here for an example) and most enzymes will be denatured. Although I cannot find data for bromelain in particular.

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by canalon
Fri May 04, 2012 1:37 pm
 
Forum: General Discussion
Topic: Digestive Enzymes and cooking temperatures
Replies: 2
Views: 2465

Digestive Enzymes and cooking temperatures

You mean what temperature you can heat bromelain to before it's denatured or to what temperature you can heat the proteins before you add the bromelain?

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by JackBean
Fri May 04, 2012 6:57 am
 
Forum: General Discussion
Topic: Digestive Enzymes and cooking temperatures
Replies: 2
Views: 2465

DNA question help

i am doing DNA fingerprinting assignment and i got stuck on this question if a restriction is "denatured", and therefore does not work, how would you recognize this on the gel?

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by ekfsksk
Sun Apr 01, 2012 10:04 pm
 
Forum: Molecular Biology
Topic: DNA question help
Replies: 3
Views: 1397

Re: Effect of temp. on cellular respiration

... till the temperature reaches up to 45 degree Celsius (in general for humans)... But at 65 degree Celsius most of the intracellular enzymes are denatured. So as the temperature increases, the cellular respiration increases up to a certain point and then there is a sharp decline so at or after ...

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by AstraSequi
Thu Mar 15, 2012 9:07 pm
 
Forum: Cell Biology
Topic: Effect of temp. on cellular respiration
Replies: 5
Views: 19718
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