Chains and heterogens:
PDB Chain Sequences:
>1tw3A (A:) gspnstaeptvaarpqqidalrtlirlgslhtpmvvrtaatlrlvdhilagartvkalaa rtdtrpeallrlirhlvaiglleedapgefvptevgelladdhpaaqrawhdltqavara disftrlpdairtgrptyesiygkpfyedlagrpdlrasfdsllacdqdvafdapaaayd wtnvrhvldvgggkggfaaaiarraphvsatvlemagtvdtarsylkdeglsdrvdvveg dffeplprkadaiilsfvllnwpdhdavriltrcaealepggriliherddlhensfneq fteldlrmlvflggalrtrekwdglaasaglvveevrqlpsptipydlsllvlapaatga
>1tw3A (A:) qidalrtlirlgslhtpmvvrtaatlrlvdhilagartvkalaartdtrpeallrlirhl vaiglleedapgefvptevgelladdhpaaqrawhdltqavaradisftrlpdairtgrp tyesiygkpfyedlagrpdlrasfdsllacdqdvafdapaaaydwtnvrhvldvgggkgg faaaiarraphvsatvlemagtvdtarsylkdeglsdrvdvvegdffeplprkadaiils fvllnwpdhdavriltrcaealepggriliherddlhensfneqfteldlrmlvflggal rtrekwdglaasaglvveevrqlpsptipydlsllvlapa
>1tw3B (B:) gspnstaeptvaarpqqidalrtlirlgslhtpmvvrtaatlrlvdhilagartvkalaa rtdtrpeallrlirhlvaiglleedapgefvptevgelladdhpaaqrawhdltqavara disftrlpdairtgrptyesiygkpfyedlagrpdlrasfdsllacdqdvafdapaaayd wtnvrhvldvgggkggfaaaiarraphvsatvlemagtvdtarsylkdeglsdrvdvveg dffeplprkadaiilsfvllnwpdhdavriltrcaealepggriliherddlhensfneq fteldlrmlvflggalrtrekwdglaasaglvveevrqlpsptipydlsllvlapaatga
>1tw3B (B:) qidalrtlirlgslhtpmvvrtaatlrlvdhilagartvkalaartdtrpeallrlirhl vaiglleedapgefvptevgelladdhpaaqrawhdltqavaradisftrlpdairtgrp tyesiygkpfyedlagrpdlrasfdsllacdqdvafdapaaaydwtnvrhvldvgggkgg faaaiarraphvsatvlemagtvdtarsylkdeglsdrvdvvegdffeplprkadaiils fvllnwpdhdavriltrcaealepggriliherddlhensfneqfteldlrmlvflggal rtrekwdglaasaglvveevrqlpsptipydlsllvlapa