rnyEx109 [nhx-2p::D3cpv + pha-1(+)]. Maintain at 20-25C to select for array. KWN190 strain expresses the FRET-based calcium indicator protein D3cpv throughout the cytoplasm of intestinal cells. Dual emission ratio imaging (ex. 435, em. 480/535-nm) can be used to measure intestinal calcium and, although the FRET pair is CFP/YFP, intestinal D3cpv fluorescence is observable under standard GFP filter sets. The D3cpv biosensor has the advantages of being relatively pH-insensitive and not interfering with endogenous calmodulin signaling. References: Am J Physiol Cell Physiol. 301:C1389-1403. Am J Physiol Cell Physiol. 297:C1071-81. FASEB J. 27:760-768. PLoS Biol. 11: e1001613.