Protein Structure Review Protein Structures Use the material

Review: Protein Structures Use the material provided to illustrate the 1°, 2°, 3° and

Go to another group and look at their model of protein structures to see

Review On the piece of paper provided draw a flow chart showing the process

Enzymes Pepsinogen Pepsin Trypsinogen Trypsin Proenzymes or enzyme precursor or zymogen Protease Proteolytic enzymes

Protein Absorption • AA are absorbed in the lumen of the small intestine •

Food Allergies • When larger peptides are absorbed • The immune system responds to

Reading the Textbook Already read • Structure: pg 177 -180 & pg 183 -187

Homework Question • AAs with similar R-groups are transported by the same transport protein

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~ Protein ~ Structure

Review: Protein Structures Use the material provided to illustrate the 1°, 2°, 3° and 4° structures of protein. Keep in mind of the following terms: - alpha helix - beta pleated sheet - hydrogen bond - disulfide bond - carboxyl and amino group 5 minutes

Go to another group and look at their model of protein structures to see if you can… – identify each structure – explain their reasoning 5 minutes

~ Protein ~ Digestion & Absorption

Review On the piece of paper provided draw a flow chart showing the process of protein digestion. - Name the reactants and products - Name the enzymes involved - Name the hormones involved 5 minutes

Enzymes Pepsinogen Pepsin Trypsinogen Trypsin Proenzymes or enzyme precursor or zymogen Protease Proteolytic enzymes Chemicals Mucus HCl IF Denaturation: HCl breaks the hydrogen and disulfide bonds, thus disrupts the 2°, 3°, 4° structures of protein making the peptide bonds available to the enzymes. Hormones Gastrin CCK Secretin Stomach Intestine http: //www. talk. co. uk/reference/encyclopaedia/hutchinson/m 0007992. html

Protein Absorption • AA are absorbed in the lumen of the small intestine • Cross the membrane of enterocytes via active and passive transport • Then cross the basolateral membrane into the capillaries • AA circulate the blood stream to the liver

Food Allergies • When larger peptides are absorbed • The immune system responds to them • Why is it that the majority of food allergies are caused by proteins? • Food Allergies are different from food intolerance which produces an nonimmunological reaction

Reading the Textbook Already read • Structure: pg 177 -180 & pg 183 -187 • Synthesis: based on class lecture • Genetics: 188 -189 Today • Digestion & Absorption: pg 189 -193 • Function: pg 193 -198

Homework Question • AAs with similar R-groups are transported by the same transport protein into the blood • Some experts recommend to avoid taking large quantities of certain amino acid supplements. Why?