Chains and heterogens:
PDB Chain Sequences:
>1b02A (A:) mtqfdkqynsiikdiinngisdeefdvrtkwdsdgtpahtlsviskqmrfdnsevpiltt kkvawktaikellwiwqlksndvndlnmmgvhiwdqwkqedgtighaygfqlgkknrsln gekvdqvdyllhqlknnpssrrhitmlwnpdeldamaltpcvyetqwyvkhgklhlevra rsndmalgnpfnvfqynvlqrmiaqvtgyelgeyifnigdchvytrhidnlkiqmereqf eapelwinpevkdfydftiddfklinykhgdkllfevav