EM Images (IMAGE) Tokyo Metropolitan University Caption EM images show sections of single-stranded DNA (ssDNA) being produced instead of double-stranded DNA (dsDNA) in the absence of AND-1. Credit Takuya Abe 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.