wigglethemouse
Senior Member (Voting Rights)
A lot of parts I wasn't sure about, like what differentially accessible here means:
I assume they are referring to differential chromatin accessible, where differential is either between PwME vs Control, or before and after CPET difference. From the paper:
Thus, we used ATAC-seq to compare chromatin accessibilities of TM (and TN) cells in the same cohort of patients and healthy controls profiled by RNA-seq, identifying 67,189 consensus chromatin-accessible regions (ChARs) across all conditions. Accessible regions were enriched at transcriptional start sites, as expected for reliable ATAC-seq profiles (SI Appendix, Fig. S4A).
That is a rather technical paper and I agree it's difficult to understand. Well done for trying.
According to AI in simple terms, chromatin accessibility refers to how "open" or "loose" the DNA is within a cell's nucleus. To understand this, it helps to know that our DNA isn't just a free-floating strand; it's tightly wound and packaged with proteins, primarily histones, into structures called chromatin.
Open vs. Closed Chromatin:
- Open (Accessible) Chromatin: Imagine a loosely wound spool of thread. In this state, the DNA is more exposed and available.
- Closed (Inaccessible) Chromatin: This is like a tightly wound, compact spool. The DNA is hidden and unavailable.
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