Chains and heterogens:
PDB Chain Sequences:
>1ak9_ (-) aqsvpygvsqikapalhsqgycgsnvkvavidsgidsshpdlkvaggasfvpsetnpfqd nnshgthvagtvaalnnsigvlgvapcaslyavkvlgadgsgqyswiingiewaiannmd vinmslggpsgsaalkaavdkavasgvvvvaaagnegtsgssstvgypakypsviavgav dssnqrasfssvgpeldvmapgvsiqstlpgnkygaksgtsmasphvagaaalilskhpn wtntqvrsslentttklgdsfyygkglinvqaaaq