What are probes and what are H3K4me3 and H3K27ac in DNA methylation?

2018-05-14 23:22:08

I'm very new to DNA methylation topic. I would like to know what are probes in terms of DNA methylation and how they are related to genes in RNAseq? Currently I'm reading this paper, Epic1 I don't understand what are H3K4me3 and H3K27ac peaks mentioned in the Figure1A. Can anyone please tell me about this. Thanq.