>1xnpB (B:) observed residues (from ATOM records)
mgeelnrlldvlgnetrrrilflltkrpyfvselsrelgvgqkavlehlrileeaglies
rvekiprgrprkyymikkglrleilltptlfgsemyeakgvrkspeyeqakeliksqepi
nvkmrelaeflhelnerireiieekreleearilietyientmrrlaeenrqiieeifrd
iekilppgyarslkekfln