Polar amino acids: Difference between revisions
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''' Polar amino acids'''<br><ref>Berg J., Tymoczko J and Stryer L, (2007) Biochemisty, 6th edition, New York: WH freeman.</ref>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 ''aspargaine ''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. <references />} | ''' Polar amino acids'''<br><ref>Berg J., Tymoczko J and Stryer L, (2007) Biochemisty, 6th edition, New York: WH freeman.</ref>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 ''aspargaine ''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. <references />} | ||
'''Polar amino acids''' | '''Polar amino acids''' | ||
{| width="200" border="1" cellpadding="1" cellspacing="1" | {| width="200" border="1" cellpadding="1" cellspacing="1" | ||
|- | |- | ||
| Serine | | Serine | ||
| Ser | | Ser | ||
| S | | S | ||
|- | |- | ||
| Cysteine | | Cysteine | ||
| Cys | | Cys | ||
| C | | C | ||
|- | |- | ||
| Threonine | | Threonine | ||
| Thr | | Thr | ||
| T | | T | ||
|- | |- | ||
| Glutamine | | Glutamine | ||
| Gln | | Gln | ||
| Q | | Q | ||
|- | |- | ||
| Asparagine | | Asparagine | ||
| Asn | | Asn | ||
| N | | N | ||
|} | |} | ||
Revision as of 18:58, 27 November 2010
Polar amino acids
[1]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 aspargaine 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.
- ↑ Berg J., Tymoczko J and Stryer L, (2007) Biochemisty, 6th edition, New York: WH freeman.
}
Polar amino acids
| Serine | Ser | S |
| Cysteine | Cys | C |
| Threonine | Thr | T |
| Glutamine | Gln | Q |
| Asparagine | Asn | N |