>4tw1K (K:) observed residues (from ATOM records)
dtkmytrtattsdsqknitqslqfnfltepnydketvfikakgtigsglrildpwnstlr
wpgsysvsiqnvddnnntnvtdfapknqdesrevkytygyktggdfsltgnitkesnyse
tisyqqpsyrtlldqstshkgvgwkveahlinnmghdhtrqltndsdnrtkseifsltrn
gnlwakdnftpkdkmpvtvsegfnpeflavmshdkkdkgksqfvvhykrsmdefkidwnr
hgfwgywsgenhvdkkeeklsalyevdwkthnvkfvkvlnd