Enzymes – Central Science Supplies

BIOCHEMISTRY II KIT

adminbenscience — Tue, 13 Oct 2026 17:22:35 +0000

Expose upper level students to an expansive survey of fascinating biochemistry experiments. The kit introduces students to scientific techniques while examining ten different topics at a more in-depth level than Biochemistry I. Includes: Determining the pH of Foods, Saliva, and Soil; Starch Determination, Sugar Determination, Fat Determination, Protein Determination, Amino Acid Determination, Pepsin to Digestion of Protein, Ninhydrin Amino Acid Detection, Effects of Varying Conditions on Salivary Amylase Activity, Modeling How Digestion Works, Determination of Ascorbic Acid Concentration, Paper Chromatography of Various Dyes and Plant Pigments
Using Different Solvents. Ideal for biology, nutrition, general science, or biochemistry courses. Required, but not included: a hot plate or water bath, 50mL beakers, forceps, storage jars with caps, funnels, and food samples for testing. Designed for 24 students working in six groups of four.
Grades 9-12

BIOCHEMISTRY I KIT

adminbenscience — Tue, 13 Oct 2026 17:21:29 +0000

This kit was designed to introduce students to the chemistry of living things and relate biochemistry to everyday life. Includes five basic biochemistry experiments in which students use chemical methods to test for proteins, carbohydrates and lipids, use Pepsin to digest protein and Ninhydrin to detect amino acids, test the activity of salivary amylase (both in vitro and in vivo), develop a technique for determining ascorbic acid concentration and use it to evaluate the vitamin C levels in substances, and determine of the alkalinity of acidity of foods. A great exploratory or introductory experience is gained by performing the test procedures. Ideal for students in biology, general science, or biochemistry courses. Required, but not included: a hot plate or water bath, glass rods, and food samples for testing. Designed for 24 students working
in six groups of four.
Grades 8-12

ADVANCED ENZYMOLOGY KIT

adminbenscience — Tue, 13 Oct 2026 17:20:27 +0000

The enzyme Invertase hydrolyzes sucrose into glucose and fructose. The amount of these reducing sugars can be measured with the chemical DNS which creates a distinctive color change. Students use a spectrophotometer to determine the reaction rate of Invertase when subjected to varied substrate concentrations, competitive and non-competitive inhibitors, changes in pH, and changes in temperature. Kit includes all necessary chemicals and a reply card for the Invertase enzyme and glucose solutions to be shipped separately upon request. Reply card items are only shipped within the continental United States. Required, but not included: lab glassware; including beakers, test tubes, and graduated cylinders; a hot plate, and a spectrophotometer. Designed for advanced biology classes and includes sufficient chemicals for 24 students working in six groups of four.
Grades 11-14

SEQUENCE OF A PEPTIDE

adminbenscience — Tue, 13 Oct 2026 17:17:55 +0000

Students will determine the amino acid sequence of a tripeptide isolated from a protein hydrolysate. The experiments in this kit enable students to determine the chain length of the peptide by formol titration, determine the amino acid content and composition of the tripeptide using chromatographic techniques to determine Rf values, and identify which amino acids are the N-terminal and C-terminal residues using solvent extraction, enzymatic digestion, and chromatographic techniques. This kit contains formaldehyde. Includes student data sheets. Designed for 24 students working in groups of four. Grade: College Level.

QUALITATIVE ANALYSIS OF CARBONHYDRATES

adminbenscience — Tue, 13 Oct 2026 17:16:55 +0000

With this kit students learn about the unique properties of carbohydrates and how to run analytical tests for characterizing various carbohydrates, starches, and sugars. Experiments includes the Anthrone test for carbohydrates, iodine test for starch, Benedict?s test for reducing carbohydrates, Barfoed?s test for reducing monosaccharides, Seliwanoff?s test for ketoses, and Bial?s test for pentoses. Required, but not included: Hot plate or burner, concentrated and 3M hydrochloric acid, concentrated sulfuric acid, glassware. Designed for 24 students working in six groups of four.
Grades 10-14

ENZYMES (INTRODUCTION ) KIT

adminbenscience — Tue, 13 Oct 2026 17:13:50 +0000

Enzymes are often present in such small quantities that the amount of enzyme is determined by measuring its ?activity? through the disappearance of a substrate or the appearance of a product. This kit is designed to study the enzyme activity of Invertase, Amylase, and Pepsin using specific enzyme assay systems. It includes five introductory experiments: Demonstrating Invertase Activity, Demonstrating Amylase Activity, Demonstrating Pepsin Activity, Demonstrating the Presence of Amylase in Saliva, and The Effect of Time on the Activity of Invertase. Invertase and amylase activity are measured using DNS color change systems. Visual examination or a spectrophotometer can be used to determine enzyme reaction rates for these systems. Kit includes all necessary chemicals and a reply card for Invertase, Amylase, Pepsin & Hemoglobin to be shipped separately upon request. Reply card items are only shipped within the continental United States. Requires lab glassware; including beakers, test tubes, and graduated cylinders; a hot plate or water bath, and a spectrophotometer or colorimeter, absorption 540 nm (optional). Designed for a class of 24 working in groups of 4. Activities are appropriate for advanced biology classes and recommended for Grades 10 ? 14.

QUALITATIVE ANALYSIS OF PROTEIN AND AMINO ACIDS

adminbenscience — Tue, 13 Oct 2026 17:13:16 +0000

This kit demonstrates the principles of protein and amino acid analysis and enables students to identify unknown compounds. In this set of lab activities, students work with the proteins, albumin and gelatin, as well as the amino acids, glutamic acid, glycine, cystine, cysteine, tyrosine, tryptophan, and arginine. Ninhydrin is used to detect the presence of amines, indicating the presence of amino acids and/or proteins, the Biuret test is used to detect the presence of peptide bonds, and specific analytical tests are used for determining the presence of individual amino acids. Protein and amino acid analysis techniques are an integral part of biochemistry and the range of tests available for analyzing amino acids and proteins are indicative of their importance. Required, but not included: concentrated nitric acid, ethanol, hot plates, balances, glassware, and distilled water. Designed for 24 students working in six groups of four.
Grades 10-14

PROPERTIES OF LIPIDS KIT

adminbenscience — Tue, 13 Oct 2026 17:06:30 +0000

Lipids constitute a heterogeneous collection of compounds grouped together because of their solubility properties. In nature they are essential for membrane structure and function and for energy storage. The tests in this kit demonstrate the properties of lipids, teach students how to identify lipids, show students how to dissolve lipids in polar substances, and allow students to distinguish between saturated and unsaturated lipids. Experiments include: Solubility of Lipids, Emulsification of Lipids, Grease Spot Test for Fats, Saponification of Fats, and Iodine Test for Absorption. This kit includes chloroform, petroleum ether, and methanol. Required, but not included: a fume hood, water bath, personal protective equipment, test tubes, and watch glasses. Designed for 24 students working in six groups of four. Grade: College Level

AMINO ACID ANALYSIS BY TLC

adminbenscience — Tue, 13 Oct 2026 17:05:44 +0000

Students learn the theory of chromatography; then separate two different unknown amino acid mixtures using thin layer chromatography (TLC) with amino acid standards run alongside the unknowns. Ninhydrin is used as a visualizing agent; then the rate of flow (Rf) values are calculated for each spot identified on the chromatograms. Students are challenged to predict the migration of the amino acids on the TLC after looking up the structures and pKa values of the four amino acid standards. The unknown components are identified by comparing the Rf values from the unknown amino acid mixtures to Rf data obtained from the four known amino acid standards. Required, but not included: hair dryer, 600 mL beakers for chromatography chambers, clear plastic rulers, and standard laboratory supplies. Designed for 24 students working in six groups of four.
Grades 10-14

PHYSICAL PROPERTIES OF PROTEIN KIT

adminbenscience — Tue, 13 Oct 2026 17:03:01 +0000

This kit demonstrates the important effects of physical parameters such as temperature, pH, salt concentration, and dielectric constants on proteins and illustrates how these effects are used in the isolation and purification of proteins. A protein?s amino acid composition and structure influence its physical characteristics. Experiments include: Isoelectric Precipitation of Casein, Separation of Albumin and Gelatin by Ammonium Sulfate Fractionation, Effects of Acetone on Albumin and Gelatin Solutions, Heat Denaturation of Albumin, and Precipitation of Protein by Lead Acetate. Required, but not included: Bunsen burner, glassware, test tube holders. Contains lead acetate. Designed for 24 students working in six groups of four.
Grades 9-14