>1rtlB (B:) observed residues (from ATOM records) qvegevqivstatqtflatcingvcwtvyhgagtrtiaspkgpviqmytnvdqdlvgwpa pqgsrsltpctcgssdlylvtrhadvipvrrrgdsrgsllsprpisylkgssggpllcpa ghavglfraavctrgvtkavdfipvenlettmr