Chains and heterogens:
PDB Chain Sequences:
>1ds4A (A:) tlvhvasvekgrsyedfqkvynaialklreddeydnyigygpvlvrlawhisgtwdkhdn tggsyggtyrfkkefndpsnaglqngfkflepihkefpwissgdlfslggvtavqemqgp kipwrcgrvdtpedttpdngrlpdadkdagyvrtffqrlnmndrevvalmgagalgkthl knsgyegpwgaannvftnefylnllnedwklekndanneqwdsksgymmlptdysliqdp kylsivkeyandqdkffkdfskafekllengitfpkdapspfifktleeqgl