Isolation and characterization of a cDNA that encodes maize uroporphyrinogen III methyltransferase, an enzyme involved in the synthesis of siroheme, which is a prosthetic group of nitrite reductase

adn amino acid sequences chemical composition complementary dna composition chimique dna escherichia coli feuille hojas leaves mais maize nitrite reductase nitrito reductasa nucleotide sequence plaste plastidios plastids racine roots zea mays