>4yu0B (B:) observed residues (from ATOM records)
ktvvvttilespyvmmkknhemlegneryegycvdlaaeiakhcgfkykltivgdgkyga
rdadtkiwngmvgelvygkadiaiapltitlvreevidfskpfmslgisimikkgtpies
aedlskqteiaygtldsgstkeffrrskiavfdkmwtymrsaepsvfvrttaegvarvrk
skgkyayllestmneyitqrkpcdtmkvggnldskgygiatpkgsslgnavnlavlklne
qglldklknkwwrdkgecg