Chains and heterogens:
PDB Chain Sequences:
>1bek_ (-) lvhvasvekgrsyedfqkvynaialklreddeydnaigygpvlvrlawhisgtwdkhdnt ggsyggtyrfkkefndpsnaglqngfkflepihkefpwissgdlfslggvtavqemqgpk ipwrcgrvdtpedttpdngrlpdadkdagyvrtffqrlnmndrevvalmgahalgkthlk nsgyegpwgaannvftnefylnllnedwklekndanneqwdsksgymmlptdysliqdpk ylsivkeyandqdkffkdfskafeklledgitfpkdapspfifktleeqgl