Chains and heterogens:
PDB Chain Sequences:
>1sspE (E:) meffgeswkkhlsgefgkpyfiklmgfvaeerkhytvyppphqvftwtqmcdikdvkvvi lgqdpyhgpnqahglcfsvqrpvppppsleniykelstdiedfvhpghgdlsgwakqgvl llnavltvrahqanshkergweqftdavvswlnqnsnglvfllwgsyaqkkgsaidrkrh hvlqtahpsplsvyrgffgcrhfsktnellqksgkkpidwkel