Endogenous sdk locus in which sequence encoding the intracellular domain (ICD) has been replaced with the cDNA sequence that encodes the bark ICD. The coding sequence is tagged at the C-terminal end with mNeonGreen. A loxP cassette containing a Disc\RFPDsRed-Express2.3xP3 marker has also been inserted, downstream of the mNeonGreen tag.