From: Characterization of constitutive CTCF/cohesin loci: a possible role in establishing topological domains in mammalian genomes
Motif
cCTCF/cCohesin
cCTCF-non-cohesin
All CTCF sites
33-mer
14.8%
3.8%
1.8%
34-mer
11.3%
1.7%
20-mer
8.2%
3.7%
1.2%
26-mer
6.8%
2.1%
1.1%