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amino acid
 
Definition:
Biology Glossary search by EverythingBio.com
 
     
 

The basic building block of proteins (or polypeptides). Containing a basic amino (NH2) group, an acidic carboxyl (COOH) group and a side chain (R - of a number of different kinds) attached to an alpha carbon atom. Thus:


R
|
NH2-C-COOH
|
H

List of amino acids

Name 3-letter symbol 1-letter symbol Type of side chain
Alanine Ala A nonpolar
Arginine Arg R pos. charged polar
Asparagine Asn N uncharged polar
Aspartic acid Asp D neg. charged polar
Cysteine Cys C uncharged polar
Glutamic acid Glu E neg. charged polar
Glutamine Gln Q uncharged polar
Glycine Gly G nonpolar
Histidine His H pos. charged polar
Isoleucine Ile I nonpolar
Leucine Leu L nonpolar
Lysine Lys K pos. charged polar
Methionine Met M nonpolar
Phenylalanine Phe F nonpolar
Proline Pro P nonpolar
Serine Ser S uncharged polar
Threonine Thr T uncharged polar
Tryptophan Trp W nonpolar
Tyrosine Try Y uncharged polar
Valine Val V nonpolar

 

 
     


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