>1zt2B (B:) observed residues (from ATOM records)
ldvkkypfikslddelkkygggitltdlllnsttlidqakdriqktksgdelphyvsyne
pvlvfyttllslailndvklirryayaeakqfrsllhteneenlleisklldlkinrcdp
ikfylekkrriiqkefcvhfidylkytkdlkedwklsgqilhkgyvyldknqligliaes
ikskivemirplnlkeipeklkslier