In structural biology, a protomer is the structural unit of an oligomeric protein. A protomer can be a protein subunit or several different subunits, that assemble in a defined stoichiometry to form an oligomer. The protomer is the smallest subset of different subunits that form the oligomer. The protomers usually arrange in cyclic symmetry to for...
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http://en.wikipedia.org/wiki/Protomer
<cell biology> Subunits from which a larger structure is built. Thus the tubulin heterodimer is the protomer for microtubule assembly, G actin the protomer for F actin. Because it avoids the difficulty that arises with, for example: dimers that serve as sub units for assembly, it is a useful term that deserves wider currency. ... (18 Nov 1997...
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http://www.encyclo.co.uk/local/20973
Type: Term Pronunciation: prō′tō-mĕr Definitions: 1. A structural subunit of a larger structure. Protomers may themselves consist of subunits. For example, tubulin, an αβ dimer, is the protomer for microtubules.
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