interpreting enhancer and promoter regions of a target gene
The NCBI nucleotide page does not have information on regulatory regions.

UCSC browser also displays regulatory regions mostly based on the ENCODE ChIP-Seq data. ENCODE project has MEF2 ChIP-Seq experiment for human cell lines. You can have a look at that. There is a MEF2 ChIP-seq experiment for mouse too.

You can analyse these data for a more detailed information.