The present invention pertains to a method of expressing a protein of
interest, preferably a heterologous protein, in preferably a plant. In a
preferred embodiment said plant is a doubled haploid homozygous
transgenic Nicotiana tabacum plant silenced for Ntp303. Furthermore, the
invention relates to said plant with or without nucleic acid constructs
according to the invention. Propagation, harvest and tissue material of
said transgenic Nicotiana tabacum plant is also a part of the invention.