Sometimes there are identical sequences in Genbank/Genpept, most often coming from the same species but different strains. Ie if I look up "bacteria chitin synthase", the 624-aa protein from Dickeya dadantii shows up three times. There even is an "identical proteins" link.
Is there any filter that I can use to get only one sequence from every group of identical ones? I mean, other than parse downloaded file on my own computer.