CRISPR/Cas9 genome editing is used to replace the stop codon with a bicistronic reporter containing a P2A peptide sequence and the fluorescent reporter ametrine. In addition, an in-frame 9 nucleotide deletion is found near the 3' end of the gene. The deletion is not believed to affect protein expression. Ametrine is a long stokes shift (excitation at 406 nanometers and emission at 526 nanometers) yellow fluorescent protein derived from Aequorea victoria. (J:259930)