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Racemic

racemic

(Science: chemistry) Pertaining to, or designating, an acid found in many kinds of grapes. It is also obtained from tartaric acid, with which it is isomeric, and from sugar, gum, etc, by oxidation. It is a sour white crystalline substance, consisting of a combination of dextrorotatory and levorotatory tartaric acids.

Origin: Cf. F. Racemique. See Raceme.


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D and L isomers of monosachrides

what we consume is sucrose isn't it? and we know that sucroce is racemic, so, there's no bitter taste or anything..:lol:

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by victor
Tue Apr 11, 2006 6:21 am
 
Forum: Molecular Biology
Topic: D and L isomers of monosachrides
Replies: 6
Views: 6371

D and L isomers of monosachrides

... there any harm in ingesting L-isomers? I ask that because I read somewhere, that many pharmacological substances, advil for example, are actually racemic and that not only is one isomer not active, but also inhibits and thus delays the effect by some time. Im thinking this because you say that ...

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by Ultrashogun
Sun Apr 09, 2006 4:17 pm
 
Forum: Molecular Biology
Topic: D and L isomers of monosachrides
Replies: 6
Views: 6371

left handed...right handed...

... amino acids that are synthesis naturally (biologically) consist of a majority of L-aa and little D-aa. While those synthesis in the lab is always racemic (i.e. amount of D : L = ~1).. Most of the amino acids in our body are L-amino acids.. consequently the secondary structure of the proteins shud ...

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by Nite
Mon Mar 27, 2006 1:22 pm
 
Forum: Molecular Biology
Topic: left handed...right handed...
Replies: 2
Views: 1778

left handed...right handed...

Hi, it's me again, Victor..I wanna ask a bit about protein.. Actually, I wonder that is protein chiral or not?? some books said that protein is racemic but what I think that inside human body, protein is made from S-amino acid...... so, if those S-amino acid stuck together to form, let's say secondary ...

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by victor
Fri Mar 17, 2006 6:57 am
 
Forum: Molecular Biology
Topic: left handed...right handed...
Replies: 2
Views: 1778

Origin of life

... famous experiment known as the Miller-Urey Experiment that show some possible evidence of abiogenesis. The Miller-Urey experiment proved that a racemic mixture of amino acids could be produced under controlled conditions. It proved nothing more. It is a huge and unwarranted extrapolation to ...

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by Springer
Wed Jan 25, 2006 4:25 pm
 
Forum: Evolution
Topic: Origin of life
Replies: 236
Views: 105477
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