Amino acids are biologically important organic compounds which perform critical roles in processes such as neurotransmitter transport and biosynthesis They are containing amine -NH2 and carboxylic acid -COOH functional groups as well as a side-chain R group specific to each amino acid usually The key elements of an amino acid are carbon hydrogen oxygen nitrogen and other elements which are found in the side-chains of certain amino acids Visit http www creative-peptides com product amino-acids-4 html to know more Hydrophobic Amino Acids Amino Acids with Hydrophobic Side Chain 8211 Aliphatic Amino Acids with Hydrophobic Side Chain 8211 Aromatic Polar Amino Acids Amino Acids with Polar Neutral Side Chains Amino Acids with Electricaly Charged Side Chains 8211 Acidic Amino Acids with Electricaly Charged Side Chains 8211 Basic