Chains and heterogens:
PDB Chain Sequences:
>1akbA (A:) sswwshvemgppdpilgvteafkrdtnskkmnlgvgayrddngkpyvlncvrkaeamiaa kkmdkeylpiagladftrasaelalgenseafksgryvtvqgisgtgslrvganflqrff kfsrdvylpkpswgnhtpifrdaglqlqayryydpktcsldftgamediskipeksiill hacahnptgvdprqeqwkelasvvkkrnllayfdmayqgfasgdinrdawalrhfieqgi dvvlsqsyahnmglygeragaftvicrdaeeakrvesqlkilirpmysnppmngariasl ilntpelrkewlvevkgmadriismrtqlvsnlkkegsshnwqhitdqigmfcftglkpe qverltkefsiymtkdgrisvagvassnvgylahaihqvtk