title: Expression systems.
mesh_terms: D000818:Animals; D001709:Biotechnology / Q000379:methods; D003001:Cloning, Molecular / Q000379:methods; D015870:Gene Expression; D006801:Humans; D011994:Recombinant Proteins / Q000096:biosynthesis*; D014162:Transfection / Q000379:methods
chemical_list: D011994:Recombinant Proteins