Chains and heterogens:
PDB Chain Sequences:
>1a2f_ (-) lvhvasvekgrsyedfqkvynaialklreddeydnyigygpvlvrlawhisgtwdkhdnt ggsyggtyrfkkefndpsnaglqngfkflepihkefpwissgdlfslggvtavqemqgpk ipwrcgrvdtpedttpdngrlpdadkdagyvrtffqrlnmndrevvalkgahalgkthlk nsgyegpwgaannvftnefylnllnedwklekndanneqwdsksgymmlptdysliqdpk ylsivkeyandqdkffkdfskafekllengitfpkdapspfifktleeqgl