>3potB (B:) observed residues (from ATOM records)
akfedkvdlyddrgnlveeqvplealsplrnpaiksivqgikrtvavnlegienalktak
vggpackimgreldldivgnaesiaaaakemiqvtedddtnvellgggkralvqvpsarf
dvaaeysaaplvtatafvqaiinefdvsmydanmvkaavlgrypqsveymganiatmldi
pqklegpgyalrnimvnhvvaatlkntlqaaalstileqtamfemgdavgafermhllgl
ayqgmnadnlvfdlvkangkegtvgsviadlveraledgvikvekeltdykvygtddlam
wnayaaaglmaatmvnqgaaraaqgvsstllyyndliefetglpsvdfgkvegtavgfsf
fshsiyggggpgifngnhivtrhskgfaipcvaaamaldagtqmfspeatsglikevfsq
vdefreplkyvveaaaeiknei