Analysis of the structure of dimeric DNA catenanes by electron microscopy Levene, S. ; Donahue, C. ; Boles, T. ; Cozzarelli, N. Abstract Publication: Biophysical Journal Pub Date: September 1995 DOI: 10.1016/S0006-3495(95)79978-7 Bibcode: 1995BpJ....69.1036L