Chains and heterogens:
PDB Chain Sequences:
>1pfrA (A:) ayttfsqtkndqlkepmffgqpvnvarydqqkydifekliekqlsffwrpeevdvsrdri dyqalpehekhifisnlkyqtlldsiqgrspnvallplisipeletwvetwafsetihsr sythiirnivndpsvvfddivtneqiqkraegissyydeliemtsywhllgegthtvngk tvtvslrelkkklylclmsvnaleairfyvafacsfafaerelmegnakiirliardeal hltgtqhmlnllrsgaddpemaeiaeeckqecydlfvqaaqqekdwadylfrdgsmigln kdilcqyveyitnirmqavgldlpfqtrsnpipwintwlv
>1pfrB (B:) ayttfsqtkndqlkepmffgqpvnvarydqqkydifekliekqlsffwrpeevdvsrdri dyqalpehekhifisnlkyqtlldsiqgrspnvallplisipeletwvetwafsetihsr sythiirnivndpsvvfddivtneqiqkraegissyydeliemtsywhllgegthtvngk tvtvslrelkkklylclmsvnaleairfyvafacsfafaerelmegnakiirliardeal hltgtqhmlnllrsgaddpemaeiaeeckqecydlfvqaaqqekdwadylfrdgsmigln kdilcqyveyitnirmqavgldlpfqtrsnpipwintwlv