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DNA Repair Enzymes: Enzymes that are involved in the reconstruction of a continuous two-stranded DNA molecule without mismatch from a molecule, which contained damaged regions.
 JoVE Biology

Quantitative, Real-time Analysis of Base Excision Repair Activity in Cell Lysates Utilizing Lesion-specific Molecular Beacons

1Department of Pharmacology & Chemical Biology, University of Pittsburgh School of Medicine, 2Hillman Cancer Center, University of Pittsburgh Cancer Institute, 3Department of Experimental Therapy, The Netherlands Cancer Institute, 4Department of Human Genetics, University of Pittsburgh School of Public Health


JoVE 4168

 JoVE Genetics

Genetic Manipulation of the Plant Pathogen Ustilago maydis to Study Fungal Biology and Plant Microbe Interactions

1Institute for Microbiology, Heinrich-Heine University Düsseldorf, 2Bioeconomy Science Center (BioSC), 3Department of Genetics, Institute of Applied Biosciences, Karlsruhe Institute of Technology, 4Cluster of Excellence in Plant Sciences (CEPLAS), Heinrich-Heine University Düsseldorf


JoVE 54522

 JoVE Biology

Deficient Pms2, ERCC1, Ku86, CcOI in Field Defects During Progression to Colon Cancer

1Department of Cell Biology and Anatomy, College of Medicine, University of Arizona, Tucson, 2Southern Arizona Veterans Affairs Health Care System, Tucson, AZ, 3Department of Surgery, College of Medicine, University of Arizona, Tucson, 4Biomedical Diagnostics and Research, Tucson, AZ, 5Department of Medicine, College of Medicine, University of Arizona, Tucson


JoVE 1931

 JoVE In-Press

A Novel Strategy Combining Array-CGH, Whole-exome Sequencing and in Utero Electroporation in Rodents to Identify Causative Genes for Brain Malformations

1Department of Neuroscience, Pharmacology and Child Health, University of Florence, 2INSERM, INMED, 3Aix-Marseille University, 4Plateforme Biologie Moléculaire et Cellulaire, INMED, 5Department of Neurology, Royal Children's Hospital, 6Murdoch Children's Research Institute, 7Department of Paediatrics, University of Melbourne, 8Plateforme postgenomique INMED, 9Department Molecular Medicine, University of Pavia, 10NIHR Biomedical Research Centre, Wellcome Trust Centre for Human Genetics, 11Department of Clinical Genetics, Oxford Radcliffe NHS Trust, 12IRCCS Casimiro Mondino Foundation, 13Research Institute of Molecular Pathology, 14IRCCS Stella Maris, 15Department of Pathology and Cell Biology, Columbia University

Video Coming Soon

JoVE 53570

 JoVE Chemistry

Deacetylation Assays to Unravel the Interplay between Sirtuins (SIRT2) and Specific Protein-substrates

1Laboratory for Molecular Cancer Biology, Department of Radiation Oncology, Robert H. Lurie Comprehensive Cancer Center, Feinberg School of Medicine, Northwestern University, 2Department of Radiation Oncology, Robert H. Lurie Comprehensive Cancer Center, Feinberg School of Medicine, Northwestern University


JoVE 53563

 JoVE Bioengineering

Techniques for the Evolution of Robust Pentose-fermenting Yeast for Bioconversion of Lignocellulose to Ethanol

1Bioenergy Research Unit, National Center for Agricultural Utilization Research, 2Mycotoxin Prevention and Applied Microbiology Research Unit, National Center for Agricultural Utilization Research, 3Chemical Engineering and Material Science, Great Lakes Bioenergy Center, Michigan State University


JoVE 54227

 JoVE Engineering

3D Printing of Biomolecular Models for Research and Pedagogy

1Department of Physics, Brandeis University, 2Bioinformatics and Computational Biosciences Branch (BCBB), NIH/NIAID/OD/OSMO/OCICB, 3Library/LTS/MakerLab, Brandeis University, 4Interfaculty Institute of Biochemistry (IFIB), University of Tübingen, 5Winship Cancer Institute, Emory University School of Medicine


JoVE 55427

 Science Education: Essentials of Biochemistry

Enzyme Assays and Kinetics

JoVE Science Education

Enzyme kinetics describes the catalytic effects of enzymes, which are biomolecules that facilitate chemical reactions necessary for living organisms. Enzymes act on molecules, referred to as substrates, to form products. Enzyme kinetic parameters are determined via assays that directly or indirectly measure changes in substrate or product concentration over time. 

This video will cover the basic principles of enzyme kinetics (including rate equations) and kinetic models. The concepts governing enzyme assays are also discussed, followed by a typical colorimetric assay. The applications section discusses an enzyme assay via Förster resonance energy transfer (FRET) analysis, characterizing extracellular enzyme activity in the environment, and investigating DNA repair kinetics using molecular probes. Enzymes are biochemical catalysts that are essential for life. Enzyme assays are used to study the kinetic properties of enzymatic reactions, elucidating the catalytic effects of enzymes. This video will cover enzyme kinetics and assays, go over a general procedure, and show some applications. Enzymes are proteins or protein-like molecules that act on a reactant molecule, referred to as the substrate. Enzymes reduce the activation energy of bioc

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