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  2. Protein - Wikipedia

    en.wikipedia.org/wiki/Protein

    Proteins are large biomolecules and macromolecules that comprise one or more long chains of amino acid residues. Proteins perform a vast array of functions within organisms, including catalysing metabolic reactions, DNA replication, responding to stimuli, providing structure to cells and organisms, and transporting molecules from one location ...

  3. List of proteins - Wikipedia

    en.wikipedia.org/wiki/List_of_proteins

    At the top level are all alpha proteins (domains consisting of alpha helices), all beta proteins (domains consisting of beta sheets), and mixed alpha helix/beta sheet proteins. While most proteins adopt a single stable fold, a few proteins can rapidly interconvert between one or more folds. These are referred to as metamorphic proteins. [5]

  4. Biological roles of the elements - Wikipedia

    en.wikipedia.org/wiki/Biological_roles_of_the...

    The remaining elements found in living things are primarily metals that play a role in determining protein structure. Examples include iron, essential to hemoglobin; and magnesium, essential to chlorophyll. Some elements are essential only to certain taxonomic groups of organisms, particularly the prokaryotes.

  5. Membrane protein - Wikipedia

    en.wikipedia.org/wiki/Membrane_protein

    Although membrane proteins play an important role in all organisms, their purification has historically, and continues to be, a huge challenge for protein scientists. In 2008, 150 unique structures of membrane proteins were available, [ 14 ] and by 2019 only 50 human membrane proteins had had their structures elucidated. [ 13 ]

  6. Zinc in biology - Wikipedia

    en.wikipedia.org/wiki/Zinc_in_biology

    Zinc fingers help read DNA sequences.. Zinc is an essential trace element for humans [1] [2] [3] and other animals, [4] for plants [5] and for microorganisms. [6] Zinc is required for the function of over 300 enzymes and 1000 transcription factors, [3] and is stored and transferred in metallothioneins.

  7. Protein function prediction - Wikipedia

    en.wikipedia.org/wiki/Protein_function_prediction

    Protein function is a broad term: the roles of proteins range from catalysis of biochemical reactions to transport to signal transduction, and a single protein may play a role in multiple processes or cellular pathways. [1] Generally, function can be thought of as, "anything that happens to or through a protein". [1]

  8. Proteolysis - Wikipedia

    en.wikipedia.org/wiki/Proteolysis

    Microbial degradation of protein in the environment can be regulated by nutrient availability. For example, limitation for major elements in proteins (carbon, nitrogen, and sulfur) induces proteolytic activity in the fungus Neurospora crassa [3] as well as in of soil organism communities. [4] Proteins in cells are broken into amino acids.

  9. Proteome - Wikipedia

    en.wikipedia.org/wiki/Proteome

    A proteome is the entire set of proteins that is, or can be, expressed by a genome, cell, tissue, or organism at a certain time. It is the set of expressed proteins in a given type of cell or organism, at a given time, under defined conditions. Proteomics is the study of the proteome.

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