Suk Won Jeong

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The expression of carotenoid biosynthesis genes coding for phytoene synthase (crtB), phytoene desaturase (crtP), zeta-carotene desaturase (crtQ), and beta-carotene hydroxylase (crtR) is dependent upon light in the cyanobacterium Synechocystis sp. PCC 6803 (Synechocystis). We have demonstrated that the expression of the above four genes was also elevated in(More)
The chromatin structures of a variety of plasmids and plasmid constructions, transiently transfected into mouse Ltk- cells using the DEAE-dextran procedure, were studied by micrococcal nuclease digestion of nuclei and Southern hybridization. Although regularly arranged nucleosome-like particles clearly were formed on the transfected DNA, the nucleosome(More)
We have found that histone H5 (or H1) induces physiological nucleosome spacings and extensive ordering on some plasmid constructions, but not on others, in a fully defined in vitro system. Plasmid pBR327 containing DNA insertions with lengths close to 300 base-pairs permitted histone H5 to induce a remarkable degree of nucleosome alignment. Seventeen(More)
Nucleosome ordering on a variety of replicating plasmids, assembled into chromatin in transfected COS-1 cells, was studied by micrococcal nuclease digestion of isolated nuclei. Generally, no more than three well defined multiples of a unit nucleosome repeat, which resembled the first three bands of the (187 +/- 5 base pair (bp)) cellular chromatin ladder,(More)
We transformed tobacco plants (Mcotiana tabacum L, Xanthi) by introducing a sense construct ofNtFtsZ1-2. This tobacco nuclear gene encodes a chloroplast-localized homologue of FtsZ, the bacterial cell-division protein. The overexpressing plants contained enlarged chloroplasts in their leaf mesophyll cells. In the T1 progeny, we observed three different(More)
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