Polar amino acids: Difference between revisions
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''' Polar amino acids'''<br>There are twenty amino acids, five of which are polar but uncharged. Two of which contain a [[Hydroxyl group|hydroxyl group]] (-OH) attached to [[Aliphatic side chain|aliphatic side chain]] that is ''[[Serine|serine]] ''and ''[[Threonine|threonine]]''. As for the [[Asparagine|'' | ''' Polar amino acids'''<br>There are twenty amino acids, five of which are polar but uncharged. Two of which contain a [[Hydroxyl group|hydroxyl group]] (-OH) attached to [[Aliphatic side chain|aliphatic side chain]] that is ''[[Serine|serine]] ''and ''[[Threonine|threonine]]''. As for the [[Asparagine|''asparagine'']] and [[Glutamine|''glutamine'']] they contain a terminal carboxamide in place of carboxylic acid. The fifth polar amino acid is ''[[Cysteine|cysteine]]'' that is structurally similar to [[Serine|serine]] but contain a [[Sulfhydryl|sulfhydryl]], or [[Thiol|thiol]] (-SH), instead of the [[Hydroxyl|hydroxyl]] (-OH) group <ref>Berg J., Tymoczko J and Stryer L, (2007) Biochemisty, 6th edition, New York: WH freeman.</ref>. </b> | ||
'''Polar amino acids''' | '''Polar amino acids''' | ||
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{| border="1" cellspacing="1" cellpadding="1" width="200" | {| border="1" cellspacing="1" cellpadding="1" width="200" | ||
|- | |- | ||
| [[Serine|Serine]] | | [[Serine|Serine]] | ||
| Ser | | Ser | ||
| S | | S | ||
|- | |- | ||
| [[Cysteine|Cysteine]] | | [[Cysteine|Cysteine]] | ||
| Cys | | Cys | ||
| C | | C | ||
|- | |- | ||
| [[Threonine|Threonine]] | | [[Threonine|Threonine]] | ||
| Thr | | Thr | ||
| T | | T | ||
|- | |- | ||
| [[Glutamine|Glutamine]] | | [[Glutamine|Glutamine]] | ||
| Gln | | Gln | ||
| Q | | Q | ||
|- | |- | ||
| [[Asparagine|Asparagine]] | | [[Asparagine|Asparagine]] | ||
| Asn | | Asn | ||
| N | | N | ||
Revision as of 19:42, 27 November 2010
Polar amino acids
There are twenty amino acids, five of which are polar but uncharged. Two of which contain a hydroxyl group (-OH) attached to aliphatic side chain that is serine and threonine. As for the asparagine and glutamine they contain a terminal carboxamide in place of carboxylic acid. The fifth polar amino acid is cysteine that is structurally similar to serine but contain a sulfhydryl, or thiol (-SH), instead of the hydroxyl (-OH) group [1]. </b>
Polar amino acids
| Serine | Ser | S |
| Cysteine | Cys | C |
| Threonine | Thr | T |
| Glutamine | Gln | Q |
| Asparagine | Asn | N |
References
- ↑ Berg J., Tymoczko J and Stryer L, (2007) Biochemisty, 6th edition, New York: WH freeman.