http://en.wikipedia.org/wiki/Amino_acids

http://users.rcn.com/jkimball.ma.ultranet/BiologyPages/A/AminoAcids.html

http://en.wikipedia.org/wiki/List_of_standard_amino_acids

http://www.bionewsonline.com/e/what_is_amino_acid.htm

http://www.biblelife.org/amino.htm

http://www.raysahelian.com/aminoacid.html

http://www.shopping.com/xGS-20_Amino_Acid

http://www.answers.com/topic/amino-acid

http://www.chem4kids.com/files/aminoacids/index.html

http://www.bodybuilding.com/store/amino.html