Chains and heterogens:
PDB Chain Sequences:
>2vtk_ (-) qqeatevrpeqkmptllrvyidgphgmgkttttqllvalgsrddivyvpepmtywrvlga setianiyttqhrldqgeisagdaavvmtsaqitmgmpyavtdavlaphiggeagsshap ppaltlifdrhpiaallcypaarylmgsmtpqavlafvalipptlpgtnivlgalpedrh idrlakrqrpgerldlamlaairrvygllantvrylqcggswredwgqlsgtavppqgae pqsnagprphigdtlftlfrapellapngdlynvfawaldvlakrlrsmhvfildydqsp agcrdallqltsgmvqthvttpgsipticdlartfaremgean
>2vtk_ (-) mptllrvyidgphgmgkttttqllvalgsrddivyvpepmtywrvlgasetianiyttqh rldqgeisagdaavvmtsaqitmgmpyavtdavlaphiggeagspppaltlifdrhpiaa llcypaarylmgsmtpqavlafvalipptlpgtnivlgalpedrhidrlakrqrpgerld lamlaairrvygllantvrylqcggswredwgqlsgprphigdtlftlfrapellapngd lynvfawaldvlakrlrsmhvfildydqspagcrdallqltsgmvqthvttpgsipticd lartfaremgean