Abstract: Methods and cells for producing scattered branched-chain fatty acids are provided. For example, the invention provides a method for producing branched-chain fatty acid comprising a methyl on one or more even number carbons. The method comprises culturing a cell comprising an exogenous or overexpressed polynucleotide comprising a nucleic acid sequence encoding a polypeptide that catalyzes the conversion of propionyl-CoA to methylmalonyl-CoA and/or an exogenous or overexpressed polynucleotide comprising a nucleic acid sequence encoding a polypeptide that catalyzes the conversion of succinyl-CoA to methylmalonyl-CoA, under conditions allowing expression of the polynucleotide(s) and production of branched-chain fatty acid. The cell produces more branched-chain fatty acid comprising a methyl on one or more even number carbons than an otherwise similar cell that does not comprise the polynucleotide(s). A cell that produces branched-chain fatty acid and the branched-chain fatty acid also are provided.

Abstract: A signalling device is provided having a plurality of differently colored light modules stacked one above the other than function properly regardless of arrangement order of the light modules within the signalling device. The signalling device includes a signal bus having a plurality of channels that extends through each light module. Each channel carries a unique status signal to one light module. Each light module is connected to and identified by a different channel, thus enabling the light modules to be arranged in any order and still function properly. One or all cover plates on each light module may be removed without requiring any light module to be removed from the signalling device. This feature enables both the light modules to be serviced while retaining their color identity and the color of the cover plates to be changed without requiring any light modules to be removed from the signalling device in either situation. The signalling device is quickly assembled with dilating rivets.