Chains and heterogens:
PDB Chain Sequences:
>1b4aA (A:) gqrhikireiimsndietqdelvdrlreagfnvtqatvsrdikemqlvkvpmangrykys lpsdqrfnplqklkralvdvfikldgtgnllvlrtlpgnahaigvlldnldwdeivgtic gddtcliicrtpkdakkvsnqllsml
>1b4aB (B:) gqrhikireiimsndietqdelvdrlreagfnvtqatvsrdikemqlvkvpmangrykys lpsdqrfnplqklkralvdvfikldgtgnllvlrtlpgnahaigvlldnldwdeivgtic gddtcliicrtpkdakkvsnqllsml
>1b4aC (C:) gqrhikireiimsndietqdelvdrlreagfnvtqatvsrdikemqlvkvpmangrykys lpsdqrfnplqklkralvdvfikldgtgnllvlrtlpgnahaigvlldnldwdeivgtic gddtcliicrtpkdakkvsnqllsml
>1b4aD (D:) gqrhikireiimsndietqdelvdrlreagfnvtqatvsrdikemqlvkvpmangrykys lpsdqrfnplqklkralvdvfikldgtgnllvlrtlpgnahaigvlldnldwdeivgtic gddtcliicrtpkdakkvsnqllsml
>1b4aE (E:) gqrhikireiimsndietqdelvdrlreagfnvtqatvsrdikemqlvkvpmangrykys lpsdqrfnplqklkralvdvfikldgtgnllvlrtlpgnahaigvlldnldwdeivgtic gddtcliicrtpkdakkvsnqllsml
>1b4aF (F:) gqrhikireiimsndietqdelvdrlreagfnvtqatvsrdikemqlvkvpmangrykys lpsdqrfnplqklkralvdvfikldgtgnllvlrtlpgnahaigvlldnldwdeivgtic gddtcliicrtpkdakkvsnqllsml