Patent ID: 7557203

Claim:
A transgenic expression cassette for expressing two nucleic acid sequences in a plant cell comprising i) at least one regulatory sequence, and ii) at least two nucleic acid sequences which are functionally linked to and heterologous in relation to said regulatory sequence, wherein the regulatory sequence has bidirectional expression activity and comprises a) the nucleotide sequence shown in SEQ ID NO: 1 or 2, or a fragment thereof having bidirectional expression activity, or b) a nucleotide sequence having at least 98% identity to the nucleotide sequence shown in SEQ ID NO: 1 or 2 and having bidirectional expression activity as the nucleotide sequence shown in SEQ ID NO: 1 or 2, wherein said regulatory sequence is disposed between the two nucleic acid sequences in such a way that the expression of the two nucleic acid sequences is brought about in at least one plant cell, wherein said two nucleic acid sequences code for i) amino acid sequences, or ii) ribonucleic acid sequences which bring about a reduction in the expression of at least one endogenous gene of said plant cell.