Chains and heterogens:
PDB Chain Sequences:
>1a2nA (A:) mdkfrvqgptklqgevtisgaknaalpilfaallaeepveiqnvpklkdvdtsmkllsql gakverngsvhidardvnvfcapydlvktmrasiwalgplvarfgqgqvslpggatigar pvdlhisgleqlgatikleegyvkasvdgrlkgahivmdkvsvgatvtimcaatlaegtt iienaarepeivdtanflitlgakisgqgtdriviegverlgggvyrvlpdrietgtflv aaaisrgkiicrnaqpdtldavlaklrdagadievgedwisldmhgkrpkavnvrtaphp afptdmqaqftllnlvaegtgfitetvfenrfmhvpelsrmgahaeiesntvichgvekl sgaqvmatdlrasaslvlagciaegttvvdriyhidrgyeriedklralganiervkge
>1a2nA (A:) mdkfrvqgptklqgevtisgaknaalpilfaallaeepveiqnvpklkdvdtsmkllsql gakverngsvhidardvnvfcapydlvktmrasiwalgplvarfgqgqvslpggatigar pvdlhisgleqlgatikleegyvkasvdgrlkgahivmdkvsvgatvtimcaatlaegtt iienaarepeivdtanflitlgakisgqgtdriviegverlgggvyrvlpdrietgtflv aaaisrgkiicrnaqpdtldavlaklrdagadievgedwisldmhgkrpkavnvrtaphp afptdmqaqftllnlvaegtgfitetvfenrfmhvpelsrmgahaeiesntvichgvekl sgaqvmatdlrasaslvlagciaegttvvdriyhidrgyeriedklralganiervkg