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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

The size of the lactose permease derived from rotational diffusion measurements.

The lactose permease of Escherichia coli was labeled with eosinyl-maleimide, reconstituted into vesicles of dimyristoylphosphatidylcholine and subjected to time-dependent phosphorescence anisotropy measurements in order to determine the rotational diffusion coefficient. By comparison with bacteriorhodopsin, the diffusion coefficient is evaluated in terms of an effective radius of the lactose permease in the plane of the membrane. This radius amounts to 20 +/- 2 A which implies that the lactose permease is a monomer. The monomeric state is maintained in the presence of a membrane potential.[1]


  1. The size of the lactose permease derived from rotational diffusion measurements. Dornmair, K., Corin, A.F., Wright, J.K., Jähnig, F. EMBO J. (1985) [Pubmed]
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