Increased expression of heterologous proteins in a plant is achieved by introducing the nucleotide sequence encoding the heterologous protein into a plant that has high oil seed content compared to low oil seed and/or is introduced into a plant having reduced alcohol soluble proteins in the endosperm. The nucleotide sequence may be introduced by direct transformation into the plant, or by direct transformation into another plant, and crossing with the high oil plant or plant have reduced levels of alcohol soluble protein in the endosperm. Further, the nucleotide sequences may be introduced into one or both of the high oil plant and the plant having reduced levels of alcohol soluble proteins, and the plants may be crossed to result in a progeny having even further increased expression levels of the heterologous protein.