Which is the bioinformatic tool useful to evaluate if a specific cytosine is present in a response element or known enhancer/repressor region? E.g., differentially methylated cytosine in chr13:42041186 position.
For human cells and tissues, You may use data from chromatin state learning (link below). It allows assessment of the chromatin state (predicted based on histone marks landscape) for a specific locus/loci for a specific cell or tissue type.