Try both and look at the maps. Both are easy to run. (Which works best seems to vary a lot from case to case.) Yamei Yu wrote: > Hi all, > > To decrease model bias from molecular replacement we can either use > Parrot or prime-and-switch-phasing. What's the difference between these > two programs? Which one is better? > > Thank you very much! > > Yamei Yu -- EMAIL DISCLAIMER http://www.york.ac.uk/docs/disclaimer/email.htm