>3l68A (A:) observed residues (from ATOM records)
alfepytlkdvtlrnriaippmsqymaedgmindwhhvhlaglarggagllvveatavap
egritpgcagiwsdahaqafvpvvqaikaagsvpgiqiahagrkasanrpwegddhiaad
dtrgwetiapsaiafgahlpkvpremtlddiarvkqdfvdaarrardagfewielhfahg
ylgqsffsehsnkrtdayggsfdnrsrflletlaavrevwpenlpltarfgvleydgrde
qtleesielarrfkaggldllsvsvgftipdtnipwgpafmgpiaervrreaklpvtsaw
gfgtpqlaeaalqanqldlvsvgrahladphwayfaakelgvekaswtlpapyahwle