Homotypic clustering of L1 and B1/Alu repeats compartmentalizes the 3D genome.

The degree of compartmental conservation is highly significant ( P < 2.2e-16), as ~80% of the genome shows consistent compartmental labeling in at least 16 samples and ~40% is invariant in all 21 samples, in contrast to 7% and 0% to be expected by chance, respectively (Supplementary information, Fig.

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