loop_ _pdbx_reference_entity_poly.prd_id _pdbx_reference_entity_poly.ref_entity_id _pdbx_reference_entity_poly.type _pdbx_reference_entity_poly.db_code _pdbx_reference_entity_poly.db_name PRD_000001 1 "peptide-like" NOR00228 Norine PRD_000006 2 "peptide-like" ? "Semi-synthetic" PRD_000007 3 "peptide-like" NOR00232 Norine PRD_000009 4 "peptide-like" NOR00237 Norine PRD_000010 5 "peptide-like" ? "Semi-synthetic" PRD_000011 6 "peptide-like" ? "Semi-synthetic"