Conditional activation of mMix does not alter cell fate decisions within the hematopoietic lineage. (A) Primitive hematopoietic (EryP and megakaryocyte) colonies formed in methylcellulose progenitor assays upon replating of day 4 i-Mix EBs cultured in the presence or absence of DOX. The colonies were scored after 6 days. (B) Definitive hematopoietic colonies formed upon replating in methycellulose of day 4 i-Mix EBs cultured in the presence or absence of DOX. The colonies were scored after 8 days.