1. What do you think is happening to the proteins within these eggs????!

2. Organic Compounds
Proteins

3. Proteins C, H, O, N Made in ribosomes Cell membranes
Hormones (insulin)
Hemoglobin
Enzymes (control the rate of reactions)

4. Building Blocks of Proteins Amino Acids
Amino Group –NH2
Carboxyl group –COOH
Variable group –R

5. Dehydration Synthesis of Proteins
Removal of a water molecule from amino acids to make proteins.
Dipeptide – two amino acids together
Tripeptide – three amino acids together
Polypeptide – more than three amino acids together
All linked together with “Peptide Bonds”

6. Dehydration Synthesis of Proteins
Amino Acid + Amino Acid -- Dipeptide + Water

7. Removing the water molecule
Producing a peptide bond

8. Dehydration Synthesis of Proteins

9. Dipeptide
Locate your peptide bond!!!

10. Can you draw a peptide bond?
Which two functional groups join to make the peptide bond???

11. How do we break proteins down?? HYDROLYSIS
Add the water molecule back in to replace the peptide bond
Put the amino acids back to the way they were!!!
Each amino acid must have an amino group –NH2 and a carboxyl group --COOH

12. Hydrolysis NOW YOU TRY…… Dipeptide + water = amino acid + amino acid
Tripeptide + 2 water molecules = amino acid + amino acid + amino acid
NOW YOU TRY……

13. Hydrolysis of Proteins

14. Hydrolysis is the OPPOSITE of dehydration synthesis
What reaction is this?
Can you locate the peptide bond?