>2xxiC (C:) observed residues (from ATOM records)
nktvvvttilespyvmmkknhemlegneryegycvdlaaeiakhcgfkykltivgdgkyg
ardadtkiwngmvgelvygkadiaiapltitlvreevidfskpfmslgisimikkgtpie
saedlskqteiaygtldsgstkeffrrskiavfdkmwtymrsaepsvfvrttaegvarvr
kskgkyayllestmneyieqrkpcdtmkvggnldskgygiatpkgsslgnavnlavlkls
eqglldklknkwwydkgecg