FP knock-in. mNG-GLO is a germline-optimized variant coded to be less prone to silencing in the germline. [NOTE: (4/1/2021) A lab has reported finding a second GFP insertion in LP728; it has not yet been confirmed whether or not it is present in the current CGC stock.] Reference: Heppert JK, et al. 2017 Genetics. In press.