| heterodimer | <biochemistry> A dimer in which the two subunits are different. One of the best known examples is tubulin that is found as an _ tubulin/_ tubulin dimer. Heterodimers are relatively common and it may be that the arrangement has the advantage that, for example: several different binding subunits may interact with a conserved signalling subunit. (18 Nov 1997) |
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