Chains and heterogens:
PDB Chain Sequences:
>3fkkA (A:) mtssstprhrgifpvvpttfadtgdldlasqkravdfmidagsdglcilanfseqfaitd derdvltrtilehvagrvpvivttshystqvcaarslraqqlgaamvmamppyhgatfrv peaqifefyarvsdaiaipimvqdapasgtalsapflarmareieqvayfkietpgaank lrelirlggdaiegpwdgeeaitlladlhagatgamtgggfpdgirpileawregrhdda yaryqawlplinhenrqsgiltakalmreggviaserprhpmpelhpdtraellaiarrl dplvlrwah
>3fkkA (A:) tprhrgifpvvpttfadtgdldlasqkravdfmidagsdglcilanfseqfaitdderdv ltrtilehvagrvpvivttshystqvcaarslraqqlgaamvmamppyhgatfrvpeaqi fefyarvsdaiaipimvqdapasgtalsapflarmareieqvayfkietpgaanklreli rlggdaiegpwdgeeaitlladlhagatgamtgggfpdgirpileawregrhddayaryq awlplinhenrqsgiltakalmreggviaserprhpmpelhpdtraellaiarrldplvl rwah
>3fkkB (B:) mtssstprhrgifpvvpttfadtgdldlasqkravdfmidagsdglcilanfseqfaitd derdvltrtilehvagrvpvivttshystqvcaarslraqqlgaamvmamppyhgatfrv peaqifefyarvsdaiaipimvqdapasgtalsapflarmareieqvayfkietpgaank lrelirlggdaiegpwdgeeaitlladlhagatgamtgggfpdgirpileawregrhdda yaryqawlplinhenrqsgiltakalmreggviaserprhpmpelhpdtraellaiarrl dplvlrwah
>3fkkB (B:) tprhrgifpvvpttfadtgdldlasqkravdfmidagsdglcilanfseqfaitdderdv ltrtilehvagrvpvivttshystqvcaarslraqqlgaamvmamppyhgatfrvpeaqi fefyarvsdaiaipimvqdapasgtalsapflarmareieqvayfkietpgaanklreli rlggdaiegpwdgeeaitlladlhagatgamtgggfpdgirpileawregrhddayaryq awlplinhenrqsgiltakalmreggviaserprhpmpelhpdtraellaiarrldplvl rwah