Patent ID: 6600093
Filing Date: 2003-07-29
Classification: C08B,C12N

Abstract:
A transgenic potato plant which, as a result of genetic engineering has a genome containing at least one gene construct containing a full length potato granule-bound starch synthase (PGBSS) cDNA or genomic DNA sequence coding for PGBSS in reverse orientation in an expression cassette which is functional in potato plants, said gene construct giving rise to tubers containing essentially amylose free starch; wherein said expression cassette comprises in the 5â€²-3â€² direction of transcription: an upstream promoter base sequence, a base sequence for transcription into mRNA under control of said upstream promoter base sequence comprising coding and template strands, and a downstream transcription terminator base sequence, wherein the coding strand of said base sequence for transcription comprises an inverted sequence of bases complementary to a run of bases of PGBSS mRNA, wherein the transcript of said base sequence for transcription substantially inhibits the expression of PGBSS.