Chains and heterogens:
PDB Chain Sequences:
>1i6nA (A:) mklcfneattlensnlkldlelcekhgydyieirtmdklpeylkdhslddlaeyfqthhi kplalnalvffnnrdekghneiitefkgmmetcktlgvkyvvavplvteqkivkeeikks svdvltelsdiaepygvkialefvghpqctvntfeqayeivntvnrdnvglvldsfhfha mgsnieslkqadgkkifiyhiddtedfpigfltdedrvwpgqgaidldahlsalkeigfs dvvsvelfrpeyykltaeeaiqtakkttvdvvskyfsm