Chains and heterogens:
PDB Chain Sequences:
>1tw2A (A:) gspnstaeptvaarpqqidalrtlirlgslhtpmvvrtaatlrlvdhilagartvkalaa rtdtrpeallrlirhlvaiglleedapgefvptevgelladdhpaaqrawhdltqavara disftrlpdairtgrptyesiygkpfyedlagrpdlrasfdsllacdqdvafdapaaayd wtnvrhvldvgggkggfaaaiarraphvsatvlemagtvdtarsylkdeglsdrvdvveg dffeplprkadaiilsfvllnwpdhdavriltrcaealepggriliherddlhensfneq fteldlrmlvflggalrtrekwdglaasaglvveevrqlpsptipydlsllvlapaatga
>1tw2A (A:) dalrtlirlgslhtpmvvrtaatlrlvdhilagartvkalaartdtrpeallrlirhlva iglleedapgefvptevgelladdhpaaqrawhdltqavaradisftrlpdairtgrpty esiygkpfyedlagrpdlrasfdsllacdqdvafdapaaaydwtnvrhvldvgggkggfa aaiarraphvsatvlemagtvdtarsylkdeglsdrvdvvegdffeplprkadaiilsfv llnwpdhdavriltrcaealepggriliherddlhensfneqfteldlrmlvflggalrt rekwdglaasaglvveevrqlpsptipydlsllvlapa
>1tw2B (B:) gspnstaeptvaarpqqidalrtlirlgslhtpmvvrtaatlrlvdhilagartvkalaa rtdtrpeallrlirhlvaiglleedapgefvptevgelladdhpaaqrawhdltqavara disftrlpdairtgrptyesiygkpfyedlagrpdlrasfdsllacdqdvafdapaaayd wtnvrhvldvgggkggfaaaiarraphvsatvlemagtvdtarsylkdeglsdrvdvveg dffeplprkadaiilsfvllnwpdhdavriltrcaealepggriliherddlhensfneq fteldlrmlvflggalrtrekwdglaasaglvveevrqlpsptipydlsllvlapaatga
>1tw2B (B:) eptvaarpqqidalrtlirlgslhtpmvvrtaatlrlvdhilagartvkalaartdtrpe allrlirhlvaiglleedapgefvptevgelladdhpaaqrawhdltqavaradisftrl pdairtgrptyesiygkpfyedlagrpdlrasfdsllacdqdvafdapaaaydwtnvrhv ldvgggkggfaaaiarraphvsatvlemagtvdtarsylkdeglsdrvdvvegdffeplp rkadaiilsfvllnwpdhdavriltrcaealepggriliherddlhensfneqfteldlr mlvflggalrtrekwdglaasaglvveevrqlpsptipydlsllvlapaa