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  1. en.wikipedia.org › wiki › SerpinSerpin - Wikipedia

    6 天前 · The serpin (white) first binds a protease (grey) with the exposed reactive centre loop (blue). When this loop is cleaved by the protease, it rapidly inserts into the A-sheet (light blue), deforming and inhibiting the protease. ( PDB: 1K9O, 1EZX ) Serine and cysteine proteases operate by a two-step catalytic mechanism.

  2. 2 天前 · Methicillin-resistant Staphylococcus aureus (MRSA, often pronounced / ˈmɜːrsə / or / ɛm ɑːr ɛs eɪ / ), is one of a number of greatly feared strains of S. aureus which have become resistant to most β-lactam antibiotics. For this reason, vancomycin, a glycopeptide antibiotic, is commonly used to combat MRSA.

  3. en.wikipedia.org › wiki › ProteinProtein - Wikipedia

    2 天前 · A representation of the 3D structure of the protein myoglobin showing turquoise α-helices. This protein was the first to have its structure solved by X-ray crystallography. Toward the right-center among the coils, a prosthetic group called a heme group (shown in gray) with a bound oxygen molecule (red). Proteins are large biomolecules and ...

  4. en.wikipedia.org › wiki › PrionPrion - Wikipedia

    6 天前 · Infectious diseases. A prion / ˈpriːɒn / ⓘ is a misfolded protein that can induce misfolding of normal variants of the same protein and trigger cellular death. Prions cause prion diseases known as transmissible spongiform encephalopathies (TSEs) that are transmissible, fatal neurodegenerative diseases in humans and animals.

  5. en.wikipedia.org › wiki › Vitamin_B12Vitamin B12 - Wikipedia

    2024年5月23日 · Vitamin B12, also known as cobalamin, is a water-soluble vitamin involved in metabolism.[2] It is one of eight B vitamins. It is required by animals, which use it as a cofactor in DNA synthesis, and in both fatty acid and amino acid metabolism.[3] It is important in the normal functioning of the nervous system via its role in the synthesis of ...

  6. en.wikipedia.org › wiki › Amino_acidAmino acid - Wikipedia

    2024年5月23日 · Structure of a typical L-alpha-amino acid in the "neutral" form Amino acids are organic compounds that contain both amino and carboxylic acid functional groups.[1] Although over 500 amino acids exist in nature, by far the most important are the 22 α-amino acids incorporated into proteins.[2] Only these 22 appear in the genetic code of life.[3 ...

  7. en.wikipedia.org › wiki › CRISPRCRISPR - Wikipedia

    2024年5月23日 · CRISPR (/ ˈ k r ɪ s p ər /) (an acronym for clustered regularly interspaced short palindromic repeats) is a family of DNA sequences found in the genomes of prokaryotic organisms such as bacteria and archaea. These sequences are derived from DNA fragments of bacteriophages that had previously infected the prokaryote. ...

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