Fuente: WIPO "biotechnology" The present invention provides plant amino acid:glyoxylate aminotransferase genes. Also disclosed are the recombinant production of these plant amino acid:glyoxylate aminotransferase enzymes in heterologous hosts, screening chemicals for herbicidal activity using these recombinantly produced enzymes, and the use of thereby identified herbicidal chemicals to suppress the growth of undesired vegetation. Furthermore, the present invention provides methods for the development of herbicide tolerance in plants, plant tissues, plant seeds, and plant cells using the amino acid:glyoxylate aminotransferase genes of the invention.