Chains and heterogens:
PDB Chain Sequences:
>1fnuA (A:) qqdpdpsqlhrsslvknlqniyflyegdpvthenvksvdqllshdliynvsgpnydklkt elknqematlfkdknvdiygveyyhlcylcenaersaciyggvtnhegnhleipkkivvk vsidgiqslsfdietnkkmvtaqeldykvrkytidnkqlytngpskyetgyikfipknke sfwfdffpepeftqskylmiykdnetldnktsqievylttk
>1fnuB (B:) qqdpdpsqlhrsslvknlqniyflyegdpvthenvksvdqllshdliynvsgpnydklkt elknqematlfkdknvdiygveyyhlcylcenaersaciyggvtnhegnhleipkkivvk vsidgiqslsfdietnkkmvtaqeldykvrkytidnkqlytngpskyetgyikfipknke sfwfdffpepeftqskylmiykdnetldnktsqievylttk
>1fnuC (C:) qqdpdpsqlhrsslvknlqniyflyegdpvthenvksvdqllshdliynvsgpnydklkt elknqematlfkdknvdiygveyyhlcylcenaersaciyggvtnhegnhleipkkivvk vsidgiqslsfdietnkkmvtaqeldykvrkytidnkqlytngpskyetgyikfipknke sfwfdffpepeftqskylmiykdnetldnktsqievylttk
>1fnuD (D:) qqdpdpsqlhrsslvknlqniyflyegdpvthenvksvdqllshdliynvsgpnydklkt elknqematlfkdknvdiygveyyhlcylcenaersaciyggvtnhegnhleipkkivvk vsidgiqslsfdietnkkmvtaqeldykvrkytidnkqlytngpskyetgyikfipknke sfwfdffpepeftqskylmiykdnetldnktsqievylttk