関連する実験動画

Updated: Jan 30, 2026

A Two-Step Method for Percutaneous Transhepatic Choledochoscopic Lithotomy
03:56

A Two-Step Method for Percutaneous Transhepatic Choledochoscopic Lithotomy

Published on: September 13, 2022

2.9K

フォルボールエステルによって誘発された変形した鶏の線維芽細胞の形態学的変化:プラズミノゲン活性化剤の直接的な触媒的関与の証拠

J P Quigley

    Cell
    |May 1, 1979
    PubMed
    まとめ

    フォルボルミリスタートアセテート (PMA) は,細胞内のセリンタンパク質酶プラズミノゲン活性化剤 (PA) の生成を誘発し,形態学的変化を引き起こします. 特定のプロテアゼ阻害剤は,これらの変化をブロックし,PAを重要な酵素責任者として特定します.

    さらに関連する動画

    In Vivo, Percutaneous, Needle Based, Optical Coherence Tomography of Renal Masses09:31

    In Vivo, Percutaneous, Needle Based, Optical Coherence Tomography of Renal Masses

    Published on: March 30, 2015

    9.3K
    Preparation and Respirometric Assessment of Mitochondria Isolated from Skeletal Muscle Tissue Obtained by Percutaneous Needle Biopsy11:27

    Preparation and Respirometric Assessment of Mitochondria Isolated from Skeletal Muscle Tissue Obtained by Percutaneous Needle Biopsy

    Published on: February 7, 2015

    20.2K

    関連する概念動画

    The Evidence for Evolution02:55

    The Evidence for Evolution

    Genetic variations accumulating within populations over generations give rise to biological evolution. Evolutionary changes can result in the formation of novel varieties and entire new species. These changes are responsible for the diverse forms of life inhabiting the planet. The evidence for evolution suggests that all living organisms descended from common ancestors.
    48.1K
    Bacterial Transformation01:33

    Bacterial Transformation

    In 1928, bacteriologist Frederick Griffith worked on a vaccine for pneumonia, which is caused by Streptococcus pneumoniae bacteria. Griffith studied two pneumonia strains in mice: one pathogenic and one non-pathogenic. Only the pathogenic strain killed host mice.
    Griffith made an unexpected discovery when he killed the pathogenic strain and mixed its remains with the live, non-pathogenic strain. Not only did the mixture kill host mice, but it also contained living pathogenic bacteria that...
    59.9K
    Turnover Number and Catalytic Efficiency01:19

    Turnover Number and Catalytic Efficiency

    The turnover number of an enzyme is the maximum number of substrate molecules it can transform per unit time. Turnover numbers for most enzymes range from 1 to 1000 molecules per second. Catalase has the known highest turnover number, capable of converting up to 2.8×106 molecules of hydrogen peroxide into water and oxygen per second. Lysozyme has the lowest known turnover number of half a molecule per second.
    Chymotrypsin is a pancreatic enzyme that breaks down proteins during digestion....
    21.5K
    Catalytically Perfect Enzymes01:07

    Catalytically Perfect Enzymes

    The theory of catalytically perfect enzymes was first proposed by W.J. Albery and J. R. Knowles in 1976. These enzymes catalyze biochemical reactions at high-speed. Their catalytic efficiency values range from 108-109 M-1s-1. These enzymes are also called 'diffusion-controlled' as the only rate-limiting step in the catalysis is that of the substrate diffusion into the active site. Examples include triose phosphate isomerase, fumarase, and superoxide dismutase.
     
    Most enzymes...
    5.1K
    Introduction to Fibroblasts01:09

    Introduction to Fibroblasts

    Rudolph Virchow discovered spindle-shaped cells called fibroblasts in 1858. Inactive fibroblasts, called fibrocytes, become activated by various stimuli, such as growth factors and inflammatory cytokines. Activated fibroblasts play a crucial role in wound healing, inflammation, formation of new blood vessels, and cancer progression. Uncontrolled activation of fibroblasts results in fibrosis, the excess deposition of fibrous tissue, which can lead to scarring and affect normal organs. This...
    3.9K
    Reduction of Alkenes: Catalytic Hydrogenation02:13

    Reduction of Alkenes: Catalytic Hydrogenation

    Alkenes undergo reduction by the addition of molecular hydrogen to give alkanes. Because the process generally occurs in the presence of a transition-metal catalyst, the reaction is called catalytic hydrogenation.
    Metals like palladium, platinum, and nickel are commonly used in their solid forms — fine powder on an inert surface. As these catalysts remain insoluble in the reaction mixture, they are referred to as heterogeneous catalysts.
    The hydrogenation process takes place on the...
    14.0K