cDNA Cloning and Structural Analysis of Granule-bound Starch Synthase Gene of Hairy Roots of Astragalus membranaceus Analysis of cloning and sequence characteristics of cDNA encoding the GBSS I gene from tubers of Solanum tuberosum Study on Regulation of 5′ Flanking Regions of Granule-bound Starch Synthase Gene of Potato Sequence Divergence and Expression Specificity of the Starch Synthase Gene Family in Oryza officinalis Leaf Molecular Cloning and Sequence of Potato Granule-Bound Starch Synthase Gene