A cassette containing a modified CreERT2-pA-Frt-Ampicillin-Frt was inserted in the first coding ATG of Ntrk3 in a bacterial artificial chromosome (BAC) containing the Ntrk3 mouse locus (RP23-38E14). Purified BAC cDNA was purified and prepared for intracytoplasmic sperm injection (ICSI). Line numbers were not indicated. The pound symbol (#) is used when no line is specified and/or lines are pooled. (J:333281)