TALEN-targeting of exon 1 deleted 33 bp (GGCTCATCTGTCAGGGAGAGATAAAACCCACAT) within the Gata2 +9.5 enhancer-like (E-box and GATA motifs) Samd14 enhancer in intron 1. Mass spectrometry for three peptides confirmed a 16-fold reduction in protein expression. (J:270526)