The VT049749 enhancer fragment followed by the Drosophila synthetic core promoter (DSCP) is fused upstream of the p65(AD)::Zip+ hemidriver (component of a 'split driver' system, contains the p65 activation domain).
Comment: when combined with P{VT013121-GAL4.DBD} (combination referred to as 'SS02542')
Acute optogenetic activation (using Cnoc\ChR1::Csub\ChRCsChrimson.IVS.20xUAS.Venus with 627 nm (red) light) of neurons targeted by the split-GAL4 pair of Scer\GAL4DBD.VT013121 and Hsap\RELAAD.VT049749 induces freezing behavior with anterior twitches of the front legs at the beginning and end of activation, unlike controls.