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Biochemistry
1-800-452-1261
flinnsci.com
Biochemistry—Carbohydrates, DNA, Fats and Proteins, continued
Physical Properties of Proteins—
Student Laboratory Kit
By: The Flinn Staff
In this hands-on kit, students examine the effects of acids and bases, inorganic salts, organic solvents and temperature on the physical properties of proteins. The dramatic results allow students to see how sensitive proteins are to physiological conditions and to the addition of external agents. Students learn how interactions among amino acids can change the three-dimensional structures of proteins. Some changes are easily reversed and relatively harmless while other changes are essen- tially irreversible and lead to complete loss of protein function. The definition and applications of protein denaturation are also explored. Includes reproducible student handouts, detailed background informa- tion, complete Instructor Notes with sample data and answers to all questions and all necessary chemicals and consumable supplies.
Complete for 30 students working in pairs.
pH and Protein Solubility—
A Reversible Demonstration Kit
By: The Flinn Staff
Demonstrate the properties of proteins and the effect of pH on protein solubility with this colorful and reversible activity. Proteins contain many acidic and basic groups that have different structures at different pH values. When acids and bases are added to a protein solution, the solubility of the protein changes drastically. This demonstration looks at the acid-base and solubility properties of casein, the main protein in milk. The structure of the protein at different pH values is discussed. Instructor Demonstration Notes included.
Concepts: Proteins, isoelectric point, solubility, pH.
Time Required: 15 minutes
Chemicals Provided: Casein, hydrochloric acid solution, sodium hydroxide solutions, universal indicator.
Essential Protein and Enzyme
Multi-Demonstration Kit
By: The Flinn Staff
Demonstrate the diverse scientific studies encompassing the chemical processes of living things. This set of three demonstrations teaches students about the biochemistry occurring in their own bodies.
• pH and Protein Solubility—Examine the effect of pH on the solubility and structure of casein to find its optimum value.
• Digestive Enzymes at Work—Learn how the body transforms food into essential nutrients to carry out cell processes and growth.
• The Floating Catalyst—Investigate the reaction of catalase, which catalyzes the decomposition of hydrogen peroxide in tissue. Includes enough materials to perform each of the above demonstra-
tions three times. Also comes with the Flinn ChemTopicTM Labs, Vol. 20, Biochemistry—The Molecules of Life, which contains instructions for four experiments and five demonstrations.
Concepts: Enzyme structure and function, proteins, pH.
Time Required: One class period
Materials Provided: Albumin, amylase, biuret test solution, casein, catalase, hydrochloric acid solution, hydrogen peroxide, iodine solu- tion, pepsin, sodium hydroxide, starch, universal indicator solution, Flinn ChemTopicTM Labs, Volume 20, Beral-type pipets.
BIOCHEMISTRY—CARBOHYDRATES, DNA, FATS AND PROTEINS continued on next page.
Physical Properties of Proteins—Student Laboratory Kit AP1768
Catalog No.
Description
Price/Each
AP1768
Physical Properties of Proteins— Student Laboratory Kit
$59.05
Catalog No.
Description
Price/Each
AP6692
pH and Protein Solubility—
A Reversible Demonstration Kit
$23.50
pH and Protein Solubility—A Reversible Demonstration Kit AP6692
Catalog No.
Description
Price/Each
FB2015
Essential Protein and Enzyme Multi-Demonstration Kit
$76.35
Essential Protein and Enzyme Multi-Demonstration Kit FB2015