For LT-HSC methylcellulose colony assays, 40 double-sorted LSK CD150+CD48ā cells from Lsd1fl/fl or Lsd1fl/fl Mx1Cre (pre-poly(I:C)) animals were plated per 1.1 ml of Methocult M3434 (Stem Cell Technologies, Vancouver, Canada) containing 1000 U/ml mouse interferon alpha (R&D Systems, Minneapolis, MN) to activate Mx1Cre-mediated deletion in vitro. Single colonies were picked and PCR genotyped to verify Lsd1 deletion.
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