Chains and heterogens:
PDB Chain Sequences:
>1clkA (A:) syqptpedkftfglwtvgwqgrdpfgdatrgaldpaesvrrlaelgahgvtfhdddlipf gatdseraehikrfrqaldetgmkvpmattnlfthpvfkdggftandrdvrryalrktir nidlavelgaqtyvawggregaesgaakdvrvaldrmkeafdllgeyvtsqgydtpfaie pkpneprgdillptighalafidglerpelygvnpevgheqmaglnfphgiaqalwagkl fhidlngqsgikydqdlrfgpgdlraafwlvdllesagyegprhfdfkpprtedfdgvwa saagcmrnylilkeraaafradpevqealraarldelaqptagdglqallpdrsafedfd pdaaaargmaferldqlamdhllgarg