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Epigenetics is not just DNA, think of it more like the (hidden) state of DNA. Histone modifications and open chromatin and other epigenetic readouts are like emissions / indicators of the hidden state.

The relationship is like that between the words in a book and the page that is actively being read. I know that is a hackneyed analogy; but coffee is wearing off :)

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Those are all readable using standard DNA sequencing techniques, so again, it's just state attributes of the DNA.

(I've worked in genomics for 30+ years. I'm not just spitballing here).

DNA libraries are read out using sequencing techniques. But I doubt anyone would say they are just measuring DNA. It’s kind of like saying a luciferase based assay is just measuring the intensity of light.

yes, that is the terminology we use.

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