DNA Lesion Models (image) University of Texas at Austin, Texas Advanced Computing Center Share Print E-Mail Caption Models showing the steric hinderance between different lesions (colored yellow and turquoise)and DNA. Steric hinderance causes double helix destabilization and refers to the degree of crowding between different atoms. Credit New York University Usage Restrictions None Share Print E-Mail 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.