DNA Domains (IMAGE) Politecnico di Milano Caption CTCF proteins isolate the various topological DNA domains. The study found that topological domains can be divided into two sections with specular grammatical sequences, delimited by two "barriers" and with a "reversal point" in the middle separating the right (blue) and left (red) CTCF sequences. The human genome compresses following a "grammar" logic comprising CTCF sequences, orientation, and the distance between them. Credit Luca Nanni Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.