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Fig. 5. Control of anterior heart field development by MEF2C. MEF2C
expression in the anterior heart field is controlled by GATA4, ISL1 and FOXH1,
together with NKX2-5. MEF2C directly activates the expression of BOP, which is
required for expression of HAND2, an essential regulator of anterior heart
field development. Solid lines indicate direct regulatory interactions and
dotted lines indicate regulatory interactions for which the underlying
mechanism has not yet been defined.