>6txrB (B:) observed residues (from ATOM records)
pkpkivlvgsgmiggvmatlivqknlgdvvmfdvvknmpqgkaldtshsnvmaysnckvt
gsnsyddlkgadvvivtagftkarddllplnnkimieigghiknlcpnafiivvtnpvdv
mvqllfehsgvpknkiiglggvldtsrlkyyisqklnvcprdvnalivgahgnkmvllkr
yitvggiplqefinnkkitdeevegifdrtvntaleivnllaspyvapaaaiiemaesyl
kdikkvlvcstllegqyghsnifggtplviggtgveqvielqlnaeektkfdeavaetkr
mkali