2. PROTEINS

3. World’s Strongest Toddler World’s Strongest Toddler

4. Protein Characteristics Learning targets: #6, #7, #8, #9, #10 Monomer - Made of amino acids 20 different kinds or “LETTERS” Polymer - protein “WORDS” made by linking 50-5000 a.a.’s together through dehydration synthesis dehydration synthesis Linked by Peptide bonds (C-N) Linked by Peptide bonds (C-N)  Elements - C, H, O, N  Chemical test – nitric acid – yellow - - biuret test - purple - - biuret test - purple-

5. Functional Groups Learning Target: #6 Amino group - NH2 Carboxyl group- COOH

6.  Essential amino acids cannot be synthesised by the organism and must form part of their diet

7. NCC-OH R H O H H R H O H H Condensation reaction NCCNCC R H O H H NCC-OH R H O H + H 2 O The peptide bond A dipeptide is formed © 2007 Paul Billiet ODWSODWS Protein Synthesis – Learning Target #9

8. Protein Functions Learning Target: #8  Structural material of the body-blood, bone, muscle, hair, skin, nails, organs  Chemical controllers (enzymes and hormones)  Video – 4 minutes Video

9. Fun Fact  Largest known protein:  Connectin- important in contraction of striated muscle tissue  34,350 amino acids  Smallest known protein:  TRP-Cage – saliva of Gila monster  20 amino acids long

10. Proteins differ by:  NUMBER of amino acids: C-A-T, W-O-L-V-E-S TYPE of amino acids: C-A-T, D-O-G SEQUENCE of amino acids: C-A-T, A-T-C SHAPE OF MOLECULE SHAPE OF MOLECULE C-A-T, c-a-t

11. Protein Myths -3 min Protein Myths -3 min