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Pepsin A: Formed from pig pepsinogen by cleavage of one peptide bond. The enzyme is a single polypeptide chain and is inhibited by methyl 2-diaazoacetamidohexanoate. It cleaves peptides preferentially at the carbonyl linkages of phenylalanine or leucine and acts as the principal digestive enzyme of gastric juice.

Fabrication of Extracellular Matrix-derived Foams and Microcarriers as Tissue-specific Cell Culture and Delivery Platforms

1Biomedical Engineering Graduate Program, The University of Western Ontario, 2Department of Anatomy & Cell Biology, Schulich School of Medicine & Dentistry, The University of Western Ontario, 3Department of Chemical Engineering, Queen's University, 4Department of Chemical & Biochemical Engineering, Faculty of Engineering, The University of Western Ontario

JoVE 55436


 Bioengineering

A Microfluidic Flow Chamber Model for Platelet Transfusion and Hemostasis Measures Platelet Deposition and Fibrin Formation in Real-time

1Transfusion Research Center, Belgian Red Cross-Flanders, 2Faculty of Medicine and Health Sciences, Ghent University, 3Blood Service, Belgian Red Cross-Flanders, 4Department of Public Health and Primary Care, KULeuven - University of Leuven

JoVE 55351


 Bioengineering

Analysis of Single-cell Gene Transcription by RNA Fluorescent In Situ Hybridization (FISH)

1Centre for Medical Parasitology, Department of International Health, Immunology & Microbiology, Faculty of Health Sciences, University of Copenhagen, 2Department of Infectious Diseases, Copenhagen University Hospital (Rigshospitalet), 3Institute of Infection and Immunology Research, School of Biology, University of Edinburgh

JoVE 4073


 Biology

Protocol for HER2 FISH Using a Non-cross-linking, Formalin-free Tissue Fixative to Combine Advantages of Cryo-preservation and Formalin Fixation

1Christian Doppler Laboratory for Biospecimen Research and Biobanking Technologies, Institute of Pathology, Medical University Graz, 2Institute of Pathology, Medical University Graz, 3Research and Development, Qiagen GmbH

Video Coming Soon

JoVE 55885


 JoVE In-Press

Quantification of Proteins Using Peptide Immunoaffinity Enrichment Coupled with Mass Spectrometry

1Clinical Research Division, Fred Hutchinson Cancer Research Center - FHCRC, 2Department of Biochemistry and Microbiology, University of Victoria, 3Broad Institute of MIT and Harvard, 4Genome BC Proteomics Centre, University of Victoria, 5Plasma Proteome Institute

JoVE 2812


 Biology

Cytogenetics

JoVE 5545

Cytogenetics is the field of study devoted to chromosomes, and involves the direct observation of a cell’s chromosomal number and structure, together known as its karyotype. Many chromosomal abnormalities are associated with disease. Each chromosome in a karyotype can be stained with a variety of dyes to give unique banding patterns. More recent techniques, including comparative genomic hybridization and fluorescence in situ hybridization (FISH), allow for detecting specific chromosomal features or abnormalities.This video will begin by examining the principles of these classical and modern cytogenetics techniques. This is followed by an examination of a general protocol for performing FISH. Finally, several examples of how karyotyping can be applied to various medical applications are presented.


 Genetics

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Preparation of Liquid Crystal Networks for Macroscopic Oscillatory Motion Induced by Light

1Institute for Complex Molecular Systems (ICMS), Technical University of Eindhoven, 2Department of Chemical Engineering and Chemistry, Laboratory of Macromolecular and Organic Chemistry, Technical University of Eindhoven, 3Department of Chemical Engineering and Chemistry, Laboratory for Functional Organic Materials and Devices (SFD), Technical University of Eindhoven

JoVE 56266


 Engineering

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Genome-wide Analysis of HDAC Inhibitor-mediated Modulation of microRNAs and mRNAs in B Cells Induced to Undergo Class-switch DNA Recombination and Plasma Cell Differentiation

1Department of Microbiology, Immunology and Molecular Genetics, University of Texas Long School of Medicine at San Antonio, 2Xiangya School of Medicine, Cental South University, 3Greehey Children’s Cancer Research Institute, University of Texas Long School of Medicine at San Antonio

JoVE 55135


 Immunology and Infection

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Single-molecule Manipulation of G-quadruplexes by Magnetic Tweezers

1School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, 2Mechanobiology Institute, National University of Singapore, 3Department of Physics, National University of Singapore, 4Research Institute for Biomimetics and Soft Matter, Fujian Provincial Key Lab for Soft Functional Materials Research, Department of Physics, Xiamen University, 5Center for Bioimaging Sciences, National University of Singapore

JoVE 56328


 Biochemistry

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The Aortic Ring Co-culture Assay: A Convenient Tool to Assess the Angiogenic Potential of Mesenchymal Stromal Cells In Vitro

1Create Fertility Centre, 2Department of Physiology, University of Toronto, 3Department of Obstetrics and Gynecology, University of Toronto, 4Department of Medical Sciences, University of Toronto, 5Department of Obstetrics and Gynecology, Women's College Hospital

JoVE 56083


 Developmental Biology

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