Hi, at the moment the GenBank.FeatureParser stores only the first accession number of an entry. (right?) Would it make sense to store all of them? (e.g. as an annotation) I would like to search a dictionary of SeqRecords by an accession number. ciao, Andreas "murple" Kuntzagk -- Andreas Kuntzagk <andreas.kuntzagk@mdc-berlin.de>