>3n1xB (B:) observed residues (from ATOM records)
ealkplktwshlagnrrrpseyevvstnlhyftdnperpweldsnlpmqtwykkycfdsp
lkhddwnafrdpdqlvyrtynllqdgqesyvqglfdqlndrghdqmltrewvetlarfyt
parylfhalqmgsvyihqiapastitncatyetadhlrwlthtayrtrelancypdvgfg
krerdvwendpawqgfreliekaliawdwgeaftainlvtkpaveeallqqlgslaqseg
dtllgllaqaqkrdaerhrrwssalvkmalekegnrevlqkwvakwepladkaieaycsa
lpdgenaiveaksasryvrqmmgl