>4tw1C (C:) observed residues (from ATOM records)
gdtkmytrtattsdsqknitqslqfnfltepnydketvfikakgtigsglrildpngywn
stlrwpgsysvsiqnvddnnntnvtdfapknqdesrevkytygyktggdfsgnitkesny
setisyqqpsyrtlldqstshkgvgwkveahlinnmghdhtrqltndsdnrtkseifslt
rngnlwakdnftpkdkmpvtvsegfnpeflavmshdkkdkgksqfvvhykrsmdefkidw
nrhggywsgenhvdkkeeklsalyevdwkthnvkfvkvlnd