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  2. Domain (biology) - Wikipedia

    en.wikipedia.org/wiki/Domain_(biology)

    In biological taxonomy, a domain (/ d ə ˈ m eɪ n / or / d oʊ ˈ m eɪ n /) (Latin: regio [1]), also dominion, [2] superkingdom, realm, or empire, is the highest taxonomic rank of all organisms taken together. It was introduced in the three-domain system of taxonomy devised by Carl Woese, Otto Kandler and Mark Wheelis in 1990. [1]

  3. Structural Classification of Proteins database - Wikipedia

    en.wikipedia.org/wiki/Structural_Classification...

    What the SCOP authors mean by "domain" is suggested by their statement that small proteins and most medium-sized ones have just one domain, [8] and by the observation that human hemoglobin, [9] which has an α 2 β 2 structure, is assigned two SCOP domains, one for the α and one for the β subunit. The shapes of domains are called "folds" in SCOP.

  4. Protein domain - Wikipedia

    en.wikipedia.org/wiki/Protein_domain

    In molecular biology, a protein domain is a region of a protein's polypeptide chain that is self-stabilizing and that folds independently from the rest. Each domain forms a compact folded three-dimensional structure. Many proteins consist of several domains, and a domain may appear in a variety of different proteins.

  5. Glossary of biology - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_biology

    This glossary of biology terms is a list of definitions of fundamental terms and concepts used in biology, the study of life and of living organisms.It is intended as introductory material for novices; for more specific and technical definitions from sub-disciplines and related fields, see Glossary of cell biology, Glossary of genetics, Glossary of evolutionary biology, Glossary of ecology ...

  6. Three-domain system - Wikipedia

    en.wikipedia.org/wiki/Three-domain_system

    The three-domain system adds a level of classification (the domains) "above" the kingdoms present in the previously used five- or six-kingdom systems.This classification system recognizes the fundamental divide between the two prokaryotic groups, insofar as Archaea appear to be more closely related to eukaryotes than they are to other prokaryotes – bacteria-like organisms with no cell nucleus.

  7. Binding domain - Wikipedia

    en.wikipedia.org/wiki/Binding_domain

    In molecular biology, binding domain is a protein domain which binds to a specific atom or molecule, such as calcium or DNA. A protein domain is a part of a protein sequence and a tertiary structure that can change or evolve , function, and live by itself independent of the rest of the protein chain. [ 1 ]

  8. Domain - Wikipedia

    en.wikipedia.org/wiki/Domain

    Unique factorization domain, an integral domain in which every non-zero element can be written as a product of irreducible elements in essentially a unique way; Domain of a function, the set of input values for which the (total) function is defined Domain of definition of a partial function; Natural domain of a partial function

  9. FERM domain - Wikipedia

    en.wikipedia.org/wiki/FERM_domain

    In molecular biology, the FERM domain (F for 4.1 protein, E for ezrin, R for radixin and M for moesin) is a widespread protein module involved in localising proteins to the plasma membrane. [1] FERM domains are found in a number of cytoskeletal -associated proteins that associate with various proteins at the interface between the plasma ...