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1 vote
1 answer
3k views

Correct way of drawing D-configuration with this stereochemistry?

Hello! I have completely memorized how to draw all 20 amino acids in the way seen in the picture (middle, between the "ball-and-stick" and fisher projection) By my understanding this is in the L ...
Johan's user avatar
  • 197
4 votes
1 answer
1k views

l- versus d-glucose

I recently purchased Dextrose from a local bulkfood store. I want to use it instead of table sugar. My concern is that it may be l-glucose instead of d-glucose. According to Wikipedia l-glucose is too ...
user8893's user avatar
3 votes
2 answers
5k views

Are all anomers diastereomers?

I am told that all anomers are diastereomers. I think this is BS. If there is a carbohydrate with only one chiral center, then changing the configuration of the anomeric carbon gives us enantiomers. ...
Dissenter's user avatar
  • 19k
6 votes
2 answers
46k views

How do we assign alpha/beta status in polysaccharides?

In polysachharides like sucrose or any other disachhaharides, how is it that we assign whether the glycosidic bond is alpha/beta ? For example the images here: http://forums.studentdoctor.net/...
Rahul's user avatar
  • 61
21 votes
3 answers
3k views

What are known examples of drugs that racemize/stereoconvert in vivo, and how are they converted?

It is known that although only the (S)-enantiomer of the infamous sedative thalidomide possesses teratogenic properties, it is not very useful to administer the pure (R)-enantiomer since it is ...
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