Chains and heterogens:
PDB Chain Sequences:
>1fn7A (A:) gseghrtlastpalwasipcprselrldlvlpsgqsfrwreqspahwsgvladqvwtltq teeqlhctvyrgdksqasrptpdeleavrkyfqldvtlaqlyhhwgsvdshfqevaqkfq gvrllrqdpieclfsficssnnniaritgmverlcqafgprliqlddvtyhgfpslqala gpeveahlrklglgyraryvsasaraileeqgglawlqqlressyeeahkalcilpgvgt kvadciclmaldkpqavpvdvhmwhiaqrdyswhpttsqakgpspqtnkelgnffrslwg pyagwaqavlfsadlrq
>1fn7A (A:) gseghrtlastpalwasipcprselrldlvlpsgqsfrwreqspahwsgvladqvwtltq teeqlhctvyrsqasrptpdeleavrkyfqldvtlaqlyhhwgsvdshfqevaqkfqgvr llrqdpieclfsficssnnniaritgmverlcqafgprliqlddvtyhgfpslqalagpe veahlrklglgyraryvsasaraileeqgglawlqqlressyeeahkalcilpgvgtkva dciclmaldkpqavpvdvhmwhiaqrdyswhpttsqakgpspqtnkelgnffrslwgpya gwaqavlfsadlrq