Transgene containing genomic DNA of 10 tRNA[Gly-GCC] genes (tRNA:Gly-GCC-1-1 (2x), tRNA:Gly-GCC-1-2 (2x), tRNA:Gly-GCC-1-3, tRNA:Gly-GCC-1-8 (2x), tRNA:Gly-GCC-1-9, tRNA:Gly-GCC-1-11 and tRNA:Gly-GCC-1-13) along with at least 700 nt upstream and 300 nt downstream sequences to ensure inclusion of regulatory sequences.