>4y99A (A:) observed residues (from ATOM records)
ddiykaaveqlteeqknefkaafdifvlgaedgsistkelgkvmrmlgqnptpeelqemi
devdedgsgtvdfdeflvmmvrsmgkseeelsdlfrmfdknadgyidleelkimlqatge
titeddieelmkdgdknndgridydeflefmkgve