Chains and heterogens:
PDB Chain Sequences:
>2xis_ (-) nyqptpedrftfglwtvgwqgrdpfgdatrraldpvesvrrlaelgahgvtfhdddlipf gssdsereehvkrfrqalddtgmkvpmattnlfthpvfkdggftandrdvrryalrktir nidlavelgaetyvawggregaesggakdvrdaldrmkeafdllgeyvtsqgydirfaie pkpneprgdillptvghalafierlerpelygvnpevgheqmaglnfphgiaqalwagkl fhidlngqngikydqdlrfgagdlraafwlvdllesagysgprhfdfkpprtedfdgvwa saagcmrnylilkeraaafradpevqealrasrldelarptaadglqallddrsafeefd vdaaaargmaferldqlamdhllgarg
>2xis_ (-) yqptpedrftfglwtvgwqgrdpfgdatrraldpvesvrrlaelgahgvtfhdddlipfg ssdsereehvkrfrqalddtgmkvpmattnlfthpvfkdggftandrdvrryalrktirn idlavelgaetyvawggregaesggakdvrdaldrmkeafdllgeyvtsqgydirfaiep kpneprgdillptvghalafierlerpelygvnpevgheqmaglnfphgiaqalwagklf hidlngqngikydqdlrfgagdlraafwlvdllesagysgprhfdfkpprtedfdgvwas aagcmrnylilkeraaafradpevqealrasrldelarptaadglqallddrsafeefdv daaaargmaferldqlamdhllgarg