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Dictionary » C » Chelation

Chelation

Definition

noun

(biochemistry)

(1) The combination of a metal ion with a chemical compound, forming a ring.

(2) The binding of a bidentate or multidentate ligand.

(medicine) The method of removing heavy metal (e.g. mercury or lead) from the bloodstream using a chelate (e.g. EDTA).


Supplement

Chelation is used in separating and extracting metals, such as in countering and treating heavy metal poisoning. A chelant or chelating agent binds to form a complex with certain metal ions to inactivate the ions so that they cannot normally react with other elements or ions.


Word origin: from Greek chele, meaning claw.

Related terms:


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Re: Phytochelatin Synthase and chelation

Thank you! :D

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by plasmodesmata11
Tue Dec 02, 2008 8:33 pm
 
Forum: Botany Discussion
Topic: Phytochelatin Synthase and chelation
Replies: 2
Views: 953

Phytochelatin Synthase and chelation

All right, I need a little help: Chelation is a process, in plants at least, where trace elements (heavy metals) are absorbed in a soluble, but bound manner. How does the plant utilize them from there? Also, uptake of iron, I hear, is necessary ...

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by plasmodesmata11
Mon Dec 01, 2008 3:51 am
 
Forum: Botany Discussion
Topic: Phytochelatin Synthase and chelation
Replies: 2
Views: 953

Re:

[mod mode ;)]The post is OK where it is [/mod mode] But as quick note you are aware that chelation have dangerous side effects and no proven efficacity as a treatment? And also that links between mercury and autism are not proven? Oh yes, I'm aware and my kids get all ...

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by CutToTheQuick
Thu Jul 31, 2008 6:11 pm
 
Forum: Human Biology
Topic: Hg and sulphhydral groups: A layman's question.
Replies: 3
Views: 715

Hg and sulphhydral groups: A layman's question.

[mod mode ;)]The post is OK where it is [/mod mode] Re chelation therapy: It likely works with diffusion and ionic bonding, so to make things simple, the Hg++ most likely to interact with the chelating agent would be outside of the protein, this is ...

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by canalon
Thu Jul 31, 2008 4:11 pm
 
Forum: Human Biology
Topic: Hg and sulphhydral groups: A layman's question.
Replies: 3
Views: 715

Hg and sulphhydral groups: A layman's question.

... of someone in the biology or biochem field. In the video, Rashid A. Buttar, DO makes the following assertions concerning mercury in the body and chelation therapy to remove mercury: Hg binds to sulphhydral groups. Hg binds to the sulphhydral group at the terminal end (tail) of the protein and ...

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by CutToTheQuick
Thu Jul 31, 2008 3:24 pm
 
Forum: Human Biology
Topic: Hg and sulphhydral groups: A layman's question.
Replies: 3
Views: 715
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