>4l03B (B:) observed residues (from ATOM records)
kkisggsvvemqgdemtriiwelikeklifpyveldlhsydlgienrdatndqvtkdaae
aikkhnvgvkcatitpdekrveefklkqmwkspndtirnilggtvfreaiickniprlvs
gwvkpiiigrhaygdqyratdfvvpgpgkveitytpsdgtqkvtylvhnfeegggvamgm
ynqdksiedfahssfqmalskgwplylstkntilkkydgrfkdifqeiydkqyksqfeaq
kiwyehrliddmvaqamkseggfiwacknydgdvqsdsvaqgygslgmmtsvlvcpdgkt
veaeaahgtvtrhyrmyqkgqetstnpiasifawtrglahrakldnnkelaffanaleev
sietieagfmtkdlaacikglpnvqrsdylntfefmdklgenlkiklaqakl