Histones (IMAGE) Max-Planck-Gesellschaft Caption The condensation of the DNA involves a dramatic restructuring of the two-meter-long DNA thread to a chromosome that has a diameter of 1.5 micrometers. The DNA is wound around the packaging proteins called "histones." Credit Image: Max Planck Society 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.