Chains and heterogens:
PDB Chain Sequences:
>6n3kA (A:) mdtsklkpndprvkyetkqirgktysyilgepagpkletvvlvhgwpdmafgwrhqipyl mslgfqvvapnmlgyagtdaprdlsqftlksvsadiaelarsfvgqdgqivlgghdwgga vvwrtayyhpelvkavfsvctplhplsaeykpledivaaghmlnfkyqlqlkgpdveari qgkdmlrrfframfggrgpngeagfstsdgvhfdvldkigapplldeqeleyyveqyalq eapelrgplnwyrtrelnakdemdrakngpplrfempalfvaaskdnalppamskgmdaf ykdltraevdathwaltqagdevnrvigewlnkalg