There was an error published in J. Cell Sci.131, jcs211524 (doi:10.1242/jcs.211524).

The formatting of Eqn 6 in the above paper was incorrect; the correct equation should read as below.

The reversible exchange of BSs between the aqueous phase and the patch we describe by the master equation:
where k+ and k are the on and off rate constants for the uptake and release of a single BS molecule. Li,N is the number of lipid molecules in the patch and BSC is the number of BS molecules in the canalicular space per membrane unit. The parameter η is a solubility index that represents the number of lipid molecules that are required to accommodate one BS molecule. The larger η, the smaller is the membrane solubility of a BS.

We apologise to readers for any confusion that this error might have caused.