Connection number topological aspect for backbone DNA networks Ali Ahmad, Ali N. A. Koam, Ibtisam Masmali, Muhammad Azeem and Haleemah Ghazwani Eur. Phys. J. E, 46 12 (2023) 120 Published online: 06 December 2023 DOI: 10.1140/epje/s10189-023-00381-9