>2xrxB (B:) SEQRES residues mtnpsphffktfewpskaaglelqneieqfyyreaqlldhrayeawfalldkdihyfmpl rtnrmiregeleysgdqdlahfdethetmygrirkvtsdvgwaenppsrtrhlvsnvivk etatpdtfevnsafilyrnrlerqvdifagerrdvlrradnnlgfsiakrtilldastll snnlsmff