>2z90B (B:) SEQRES residues
msarrtesdiqgfhatpefggnlqkvlvdlielslqgkqahwnvvgsnfrdlhlqldelv
dfaregsdtiaermraldavpdgrsdtvaatttlpefpaferstadvvdlittrinatvd
tirrvhdavdaedpstadllhglidglekqawlirsenrkv