Chains and heterogens:
PDB Chain Sequences:
>1s3fA (A:) mkavvptgkiylgspfysdaqreraakakellaknpsiahvffpfddgftdpdeknpeig girsmvwrdatyqndltgisnatcgvflydmdqlddgsafeigfmramhkpvilvpfteh pekekkmnlmiaqgvttiidgntefekladynfnecpsnpvrgygiy
>1s3fA (A:) mkavvptgkiylgspfysdaqreraakakellaknpsiahvffpfdgftdpdekpeiggi rsmvwrdatyqndltgisnatcgvflydmdqlddgsafeigfmramhkpvilvpftehpe kekkmnlmiaqgvttiidgntefekladynfnecpsnpvrgygiy
>1s3fB (B:) mkavvptgkiylgspfysdaqreraakakellaknpsiahvffpfddgftdpdeknpeig girsmvwrdatyqndltgisnatcgvflydmdqlddgsafeigfmramhkpvilvpfteh pekekkmnlmiaqgvttiidgntefekladynfnecpsnpvrgygiy
>1s3fC (C:) mkavvptgkiylgspfysdaqreraakakellaknpsiahvffpfddgftdpdeknpeig girsmvwrdatyqndltgisnatcgvflydmdqlddgsafeigfmramhkpvilvpfteh pekekkmnlmiaqgvttiidgntefekladynfnecpsnpvrgygiy