DNA Gridiron (VIDEO) Arizona State University This video is under embargo. Please login to access this video. Caption This is an 11-by-11 gridiron structure (11 vertical helices by 11 horizontal helices) with 21 base pairs (bp) between junctions in both directions uses 5301 of 7249 nucleotides of the M13 DNA scaffold strand and con- tains 120 staple strands (42 nucleotides each). Credit Hao Yan lab, Biodesign Institute 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.