>4k5xA (A:) observed residues (from ATOM records)
lhkepatlikaidgdtmklmykgqpmtfrfllvdtpetkhpvekygpeasaftkkmvena
kkievefdkgqrtdkygrglayiyadgkmvnealvrqglakvayvykpnntheqhlrkse
aqakkeklniws