cp189[mrck-1::GFP::3xFlag]. GFP inserted at the C terminus of endogenous mrck-1 gene by Cas9-triggered homologous recombination. Floxed selection cassette was subsequently removed by Cre/Lox recombination leaving a LoxP scar after the 3'UTR. GFP expression in early embryos, larvae, and adults. Reference: Marston DJ, et al. Curr Biol. 2016 26:2079-2089.