sraEx278 [npr-9p::Arch::TagRFP + pBX(pha-1(+))]. Maintain at 25C. This transgenic line expresses TagRFP in AIB and has little response to blue light in the absence of ATR. In the presence of ATR the reversal rate of the animal is decreased upon symmetrical stimulation. Reference: Kocabas A, et al. Nature. 2012 Sep 23. doi: 10.1038/nature11431.