(A) Scheme depicting the protocol used to evaluate the hematopoietic and cardiac outcomes of Mesp1 induction by Dox from day 2.25–3.25 on ES cell differentiation.
(B–D) FACS analysis showing that a defined transient pulse of Mesp1 promoted mesoderm patterning (Flk-1+ and/or PDGFRα+) by day 4 (B), hematopoietic differentiation (c-Kit+/− CD41+) by day 6 (C), and cardiac differentiation (cTnT+) by day 8.