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The smallest unit forming a homo-oligomer, i.e. one protein chain or subunit, is designated as a monomer, subunit or protomer. The latter term was originally devised to specify the smallest unit of hetero-oligomeric proteins, but is also applied to homo-oligomeric proteins in current literature.
Protomer. In structural biology, a protomer is the structural unit of an oligomeric protein. It is the smallest unit composed of at least one protein chain. The protomers associate to form a larger oligomer of two or more copies of this unit. Protomers usually arrange in cyclic symmetry to form closed point group symmetries.
67895. Anatomical terms of microanatomy. [edit on Wikidata] A sarcomere (Greek σάρξ sarx "flesh", μέρος meros "part") is the smallest functional unit of striated muscle tissue. [1] It is the repeating unit between two Z-lines. Skeletal muscles are composed of tubular muscle cells (called muscle fibers or myofibers) which are formed ...
This receptor has a bound peptide (in the binding pocket) of heterologous origin that also contributes to function. In structural biology, a protein subunit is a polypeptide chain or single protein molecule that assembles (or " coassembles ") with others to form a protein complex. [1][2][3] Large assemblies of proteins such as viruses often use ...
Interactive animation of the structure of ATP. Adenosine triphosphate (ATP) is a nucleoside triphosphate [2] that provides energy to drive and support many processes in living cells, such as muscle contraction, nerve impulse propagation, and chemical synthesis.
Peptides are short chains of amino acids linked by peptide bonds. [ 1 ][ 2 ] A polypeptide is a longer, continuous, unbranched peptide chain. [ 3 ] Polypeptides that have a molecular mass of 10,000 Da or more are called proteins. [ 4 ] Chains of fewer than twenty amino acids are called oligopeptides, and include dipeptides, tripeptides, and ...
Small protein. Small proteins are a diverse fold class of proteins (usually <100 amino acids long). [1][2][3] Their tertiary structure is usually maintained by disulphide bridges, [4] metal ligands, [5] and or cofactors such as heme. Some small proteins serve important regulatory functions by direct interaction with certain enzymes and are ...
Ribosomes (/ ˈraɪbəzoʊm, - soʊm /) are macromolecular machines, found within all cells, that perform biological protein synthesis (messenger RNA translation). Ribosomes link amino acids together in the order specified by the codons of messenger RNA molecules to form polypeptide chains. Ribosomes consist of two major components: the small ...