In terms of epigenetics,how the promoter would be described for a gene that is not expressed in lung tissue but is expressed in heart tissue?

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In epigenetics, gene expression is often regulated by the methylation of cytosine bases in the promoter region of a gene. When the promoter is hypermethylated, the gene is typically not expressed because the methylation prevents the binding of transcription factors necessary for gene expression. Therefore, if a gene is not expressed in lung tissue but is expressed in heart tissue, it would be expected that the promoter's cytosines are hypermethylated in lung cells (silencing gene expression) and hypomethylated in heart cells (allowing gene expression).

In Terms of Epigenetics,how the Promoter Would Be Described for a Gene