Amino acids

• Amino acids have an amine group ($-NH_2$) at one end and a carboxyl group ($-COOH$) at the other end with a carbon connecting them which may have a R group attached.
• Amino acids are joined together by peptide bonds, a form of covalent bond
• A peptide bond is made from a condensation reaction and broken down by hydrolysis
• Enzymes catalyse any condensation reactions and hydrolysis.
• Two amino acids joined together form a dipeptide.
• More than two amino acids joined together form a polypeptide.