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By screening a genomic library of maize, a 2.2 kb 5′ flanking fragment of Zpu1 gene, encoding the pullulanase-type starch debranching enzyme, was isolated. Promoter fragments of various lengths, including the full 5′ flanking sequence (−2267 to −1) (Z1), a 3′ deletion (−2267 to −513) (Z5) and three 5′ deletions extending to −1943 (Z2), −1143 (Z3) and −516 (Z4) upstream of the translational initiation...
The β-glucosidase gene of maize (ZmGLU1) was suggested to hydrolyze cytokinin-conjugate and release free cytokinin during plant growth and development. A clone containing the upstream region of ZmGLU1 was isolated and sequenced from a maize genomic library. The full-length ZmGLU1 promoter and a series of its 5′ deletions were fused to the beta-glucuronidase (GUS) reporter gene and transferred into...
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