Chains and heterogens:
PDB Chain Sequences:
>1atuA (A:) ptfnkitpnlaefafslyrqlahqsnstnilfspvsiaaafamlslgakgdthdeilegl nfnlteipeaqihegfqellrtlnqpdsqlqlttgnglflseglklvdkfledvkklyhs eaftvnfgdteeakkqindyvekgtqgkivdlvkeldrdtvfalvnyiffkgkwerpfev kdteeedfhvdqvttvkvpmmkrlgmfniqhckklsswvllmkylgnataifflpdegkl qhlenelthdiitkflenedrrsaslhlpklsitgtydlksvlgqlgitkvfsngadlsg vteeaplklskavhkavltidekgteaagamfleaipmsippevkfnkpfvfliieqntk aplfmgrvvnptqk