Shouldn't methods like primary_seq, annotation, add_SeqFeature be part of the SeqI interface? They are part of Seq.pm. I'm trying to be sure that I provide a complete implementation of Bio::SeqI in Bio::CorbaClient::Seq. Thanks. Jason Stajich jason@chg.mc.duke.edu Center for Human Genetics Duke University Medical Center http://www.chg.duke.edu/