The star is usually for sugar atoms, not for the bases. I don't remember what curves wants.
Does your PDB have apostrophes instead of stars? If so you should just do a global search and replace. If you still have a problem, you should copy-paste the error message. James On Jul 2, 2012, at 12:44 PM, Nikolai Suslov wrote: > Hello, > > I am trying to analyze an RNA helix with curves+. I keep receiving an > error message that base atom C1* is missing from the pdb. C1 atoms > are certainly all there. > > Any advice on how to troubleshoot this will be much appreciated. > > Sincerely, > Nikolai Suslov