<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; color: rgb(0, 0, 0); font-size: 14px; font-family: Calibri, sans-serif; "><div><div>Dear phenixbb,</div><div><br></div><div>I am sure this is a trivial problem encountered before and that there is a solution to it – however, I was unfortunately not able to solve it myself or with the help of the online documentation.</div><div><br></div><div>The problem:</div><div>In one of my structures a nucleic acid chain extends over several symmetry mates. How can I create and refine a bond (in my case 5'-phosphate to 3'-end ) to that symmetry mate? </div><div><br></div><div>Many thanks in advance</div><div><br></div><div>Eike</div></div></body></html>