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Amino Acids C H HO C H CH 2OH O O C OH NH2 C H CH 3 L -Glyceraldehyde L - Alanine Zwitterion O C OH NH 2 C H CH 3 O C O - NH 3 + C H CH 3Amino Acids C H HO C H CH 2OH O O C OH NH2 C H CH 3 L -Glyceraldehyde L - Alanine Zwitterion O C OH NH 2 C H CH 3 O C O - NH 3 + C H CH 3