Amino Acids
From Proteopedia
m (polishing: dignified "see also" with a subheading) |
(Began list of properties of each amino acid) |
||
| Line 1: | Line 1: | ||
For a general introduction to ''amino acids'', please see [http://en.wikipedia.org/wiki/Amino_acids Amino Acids in Wikipedia]. | For a general introduction to ''amino acids'', please see [http://en.wikipedia.org/wiki/Amino_acids Amino Acids in Wikipedia]. | ||
| - | |||
| - | Angel Herráez has provided a [http://biomodel.uah.es/en/model3/index.htm tutorial introduction to amino acid structure] in which each of the 20 amino acids may be visualized in 3D using Jmol. | ||
Here are the names of the twenty standard amino acids, with their three and one-letter abbreviations. Mnemonic names may help you to remember the one-letter codes, but are not the correct names. | Here are the names of the twenty standard amino acids, with their three and one-letter abbreviations. Mnemonic names may help you to remember the one-letter codes, but are not the correct names. | ||
| Line 51: | Line 49: | ||
</tr> | </tr> | ||
</table> | </table> | ||
| + | |||
| + | Angel Herráez has provided a [http://biomodel.uah.es/en/model3/index.htm tutorial introduction to amino acid structure] in which each of the 20 amino acids may be visualized in 3D using Jmol. | ||
| + | |||
| + | The list below will gradually be expanded to include all 20 amino acids. | ||
| + | |||
| + | ===Histidine His H=== | ||
| + | Charged: <font color="blue"><b>Basic</b></font>, Aromatic, Bulky | ||
| + | |||
| + | See [http://en.wikipedia.org/wiki/Histidine Histidine] in Wikipedia, where the structure is shown. | ||
| + | The sidechain of His can be positively charged (protonated), in which case both of the nitrogens in the sidechain imidazole ring have hydrogens, and the charge is delocalized between them. The pKa for protonation is 6.1. This means that, on average at any moment, half of the His sidechains are protonated when the pH is 6.1. At the pH of blood, 7.4 ±0.05, more than 90% of the His sidechains are positively charged. | ||
| + | |||
| + | ===Tyrosine Tyr Y=== | ||
| + | Neutral, Polar, Aromatic, Bulky | ||
| + | |||
| + | See [http://en.wikipedia.org/wiki/Tyrosine Tyrosine] in Wikipedia, where the structure is shown. | ||
| + | |||
==See Also== | ==See Also== | ||
Revision as of 13:29, 23 May 2009
For a general introduction to amino acids, please see Amino Acids in Wikipedia.
Here are the names of the twenty standard amino acids, with their three and one-letter abbreviations. Mnemonic names may help you to remember the one-letter codes, but are not the correct names.
|
Ala A Alanine
|
Gln Q Glutamine |
Leu L Leucine
|
Ser S Serine
|
Angel Herráez has provided a tutorial introduction to amino acid structure in which each of the 20 amino acids may be visualized in 3D using Jmol.
The list below will gradually be expanded to include all 20 amino acids.
Histidine His H
Charged: Basic, Aromatic, Bulky
See Histidine in Wikipedia, where the structure is shown. The sidechain of His can be positively charged (protonated), in which case both of the nitrogens in the sidechain imidazole ring have hydrogens, and the charge is delocalized between them. The pKa for protonation is 6.1. This means that, on average at any moment, half of the His sidechains are protonated when the pH is 6.1. At the pH of blood, 7.4 ±0.05, more than 90% of the His sidechains are positively charged.
Tyrosine Tyr Y
Neutral, Polar, Aromatic, Bulky
See Tyrosine in Wikipedia, where the structure is shown.
