An isolated nucleic acid molecule comprising: a synthetic Brassica -derived nucleotide sequence that encodes a peptide, wherein the peptide comprises: a contiguous amino acid sequence of a first Brassica chloroplast transit peptide; and, a contiguous amino acid sequence of a second chloroplast transit peptide, wherein the peptide is at least 95% identical to the chloroplast transit peptide selected from the group consisting of SEQ ID NOs: 6 and 8, wherein preferably the isolated nucleic acid molecule fulfills at least one of the following: i) the first Brassica chloroplast transit peptide is from Brassica napus, wherein preferably the second chloroplast transit peptide is from a Brassica sp. other than the first Brassica chloroplast transit peptide, ii) the second chloroplast transit peptide is from an Arabidopsis sp, wherein preferably the second chloroplast transit peptide is from Arabidopsis thaliana, iii) the first Brassica chloroplast transit peptide is from an 3-enolpyruvylshikimate-5-phosphate synthetase gene, iv) the second chloroplast transit peptide is from an 3-enolpyruvylshikimate-5-phosphate synthetase gene, v) the peptide encoded by the synthetic Brassica -derived nucleic acid molecule is at least 98% identical to a chloroplast transit peptide selected from the group consisting of SEQ ID NOs:6 and 8 and most preferred the peptide is selected from the group consisting of SEQ ID NOs:6 and 8. a synthetic Brassica -derived nucleotide sequence that encodes a peptide, wherein the peptide comprises: a contiguous amino acid sequence of a first Brassica chloroplast transit peptide; and, a contiguous amino acid sequence of a second chloroplast transit peptide, wherein the peptide is at least 95% identical to the chloroplast transit peptide selected from the group consisting of SEQ ID NOs: 6 and 8, wherein preferably the isolated nucleic acid molecule fulfills at least one of the following: i) the first Brassica chloroplast transit peptide is from Brassica napus, wherein preferably the second chloroplast transit peptide is from a Brassica sp. other than the first Brassica chloroplast transit peptide, ii) the second chloroplast transit peptide is from an Arabidopsis sp, wherein preferably the second chloroplast transit peptide is from Arabidopsis thaliana, iii) the first Brassica chloroplast transit peptide is from an 3-enolpyruvylshikimate-5-phosphate synthetase gene, iv) the second chloroplast transit peptide is from an 3-enolpyruvylshikimate-5-phosphate synthetase gene, v) the peptide encoded by the synthetic Brassica -derived nucleic acid molecule is at least 98% identical to a chloroplast transit peptide selected from the group consisting of SEQ ID NOs:6 and 8 and most preferred the peptide is selected from the group consisting of SEQ ID NOs:6 and 8. i) the first Brassica chloroplast transit peptide is from Brassica napus, wherein preferably the second chloroplast transit peptide is from a Brassica sp. other than the first Brassica chloroplast transit peptide, ii) the second chloroplast transit peptide is from an Arabidopsis sp, wherein preferably the second chloroplast transit peptide is from Arabidopsis thaliana, iii) the first Brassica chloroplast transit peptide is from an 3-enolpyruvylshikimate-5-phosphate synthetase gene, iv) the second chloroplast transit peptide is from an 3-enolpyruvylshikimate-5-phosphate synthetase gene, v) the peptide encoded by the synthetic Brassica -derived nucleic acid molecule is at least 98% identical to a chloroplast transit peptide selected from the group consisting of SEQ ID NOs:6 and 8 and most preferred the peptide is selected from the group consisting of SEQ ID NOs:6 and 8.