>4ku4B (B:) observed residues (from ATOM records)
gagkitdkiamlgeggvgktsltvnltkhvfsetydptledsyrrqcvidgipshleild
tagygalreqwirqnelfvivfdvtrrssfeaaerlfeeviqtkrkldepfapslvvlvg
nkcdldtrrevgtlegsslakklgcgfvetsaklgtnveeaffsvvradrrrk