>2br2U (U:) observed residues (from ATOM records)
msstpsnqniipiikkesivslfekgirqdgrkltdyrplsitldyakkadgsalvklgt
tmvlagtkleidkpyedtpnqgnlivnvellpdenaielarvvdrslrdskaldltklvi
epgksvwtvwldvyvldyggnvldactlasvaalyntkvykveqisvnknevvgklplny
pvvtisvakvdkylvvdpdldeesimdakisfsytpdlkivgiqksgkgsmslqdidqae
ntarstavklleelkkhlgi