Could find_pair be modified to recognize explicit ribonucleotide abreviations (RG,RA,RC,RU,RG5,...,RC3,...)? These are used by AMBER's ptraj and have to be substituted with single-letter base desigations before find_pair recognizes them.
Is it intended that when you enter "find_pair -h" the previous set of files from a find_pair analysis are erased?
Mike Bruist