>3fixA (A:) observed residues (from ATOM records) yfqsnamsieirklsiedletlievareswkwtyagiyseeyieswirekyskekllnei vrsqsnldilflgafadstligfielkiiankaellrlylkpeythkkigktllleaeki mkkkgilecrlyvhrqnsvgfsfyykngfkvedtdgsdfimekky