Molecular cloning and characterization of a cDNA encoding the gibberellin biosynthetic enzyme ent-kaurene synthase B from pumpkin (Cucurbita maxima L.)

adn amino acid sequences biosynthese biosynthesis chemical composition clonage cloning complementary dna composition chimique cucurbita maxima dna escherichia coli ga gene expression gibberelline gibberellins graine nucleotide sequence seeds semilla