The intronic Gata2 enhancer was targeted with an sgRNA (targeting TCTCCTGCCGGAGTTTCCTATCCGG) and an ssODN template (TTTCAAAACAGCCCAGCAAGAGGCAGGACTGAGTCGAGGTGGCTCTGAAAACTTGCCGGTCCAGAAACAGATACACGAAGTTTCCTTATCTACCGGCTGCAGATGTCCGGATAGGAAACTCCGGC) using CRISPR/Cas9 technology, resulting in a C-to-T mutation disabling the Ets motif TTCC by changing it to TTCT. (J:295045)