>4x6dA (A:) observed residues (from ATOM records)
plsfhviwiasfkqnlvsgwlsdlqthtwdsnsstivflwpwsrgnfsneewkeletlfr
irtirsfegirryahelqfeypfeiqvtggcelhsgkvsgsflqlayqgsdfvsfqnnsw
lpypvagnmakhfckvlnqnqhendithnllsdtcprfilglldagkahlqrqvkpeawl
shgpspgpghlqlvchvsgfypkpvwvmwmrgeqeqqgtqrgdilpsadgtwylratlev
aageaadlscrvkhsslegqdivlywe