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  2. Enzyme - Wikipedia

    en.wikipedia.org/wiki/Enzyme

    In 1926, James B. Sumner showed that the enzyme urease was a pure protein and crystallized it; he did likewise for the enzyme catalase in 1937. The conclusion that pure proteins can be enzymes was definitively demonstrated by John Howard Northrop and Wendell Meredith Stanley , who worked on the digestive enzymes pepsin (1930), trypsin and ...

  3. List of proteins - Wikipedia

    en.wikipedia.org/wiki/List_of_proteins

    Enzymes classified according to their Enzyme Commission number (EC). Note that strictly speaking, an EC number corresponds to the reaction the enzyme catalyzes, not the protein per se. However each EC number has been mapped to one or more specific proteins. List of enzymes; EC 1: Oxidoreductases; EC 2: Transferases; EC 3: Hydrolases; EC 4: Lyases

  4. Active site - Wikipedia

    en.wikipedia.org/wiki/Active_site

    This enzyme targets the specific phenylalanine-proline cleave site within the target protein. [14] If HIV protease is switched off the virion particle will lose function and cannot infect patients. Since it is essential in viral replication and is absent in healthy human, it is an ideal target for drug development .

  5. Protein - Wikipedia

    en.wikipedia.org/wiki/Protein

    Proteinprotein interactions regulate enzymatic activity, control progression through the cell cycle, and allow the assembly of large protein complexes that carry out many closely related reactions with a common biological function. Proteins can bind to, or be integrated into, cell membranes.

  6. Enzyme catalysis - Wikipedia

    en.wikipedia.org/wiki/Enzyme_catalysis

    Enzyme catalysis is the increase in the rate of a process by an "enzyme", a biological molecule. Most enzymes are proteins, and most such processes are chemical reactions. Within the enzyme, generally catalysis occurs at a localized site, called the active site.

  7. Glycine cleavage system - Wikipedia

    en.wikipedia.org/wiki/Glycine_cleavage_system

    In the enzymatic reaction, H-protein activates the P-protein, which catalyzes the decarboxylation of glycine and attaches the intermediate molecule to the H-protein to be shuttled to the T-protein. [4] [5] The H-protein forms a complex with the T-protein that uses tetrahydrofolate and yields ammonia and 5,10-methylenetetrahydrofolate.

  8. Ribozyme - Wikipedia

    en.wikipedia.org/wiki/Ribozyme

    3D structure of a hammerhead ribozyme. Ribozymes (ribonucleic acid enzymes) are RNA molecules that have the ability to catalyze specific biochemical reactions, including RNA splicing in gene expression, similar to the action of protein enzymes.

  9. Post-translational modification - Wikipedia

    en.wikipedia.org/wiki/Post-translational...

    Examples of non-enzymatic PTMs are glycation, glycoxidation, nitrosylation, oxidation, succination, and lipoxidation. [15] glycation, the addition of a sugar molecule to a protein without the controlling action of an enzyme. carbamylation the addition of Isocyanic acid to a protein's N-terminus or the side-chain of Lys. [16]

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