Movie S1: progression of the precipitation front. Four TollN6-VLR capillaries were set up with reservoirs either of 3.4 M sodium malonate pH 7.0 (two capillaries on the left) or 0.15M I3C, 2.89M sodium malonate pH 7.0 (two capillaries on the right). A picture was taken every hour over ten days. A movie was generated with 24 frames per second. The progression of the precipitation front is clearly visible in the second capillary from the left. DOI: 10.1107/S0021889812051606/

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