Just as the first transgenic plant obtained by Chilton's laboratory in Washington failed to express recombinant protein, similar attempts by other research groups ran into the same sort of difficulties.
Así como la primera planta transgénica, obtenida por el laboratorio de Chilton en Washington, no lograba expresar la proteína recombinante, intentos parecidos de otros grupos de investigación presentaron dificultades similares.