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- W75798601 abstract "The bioconversion of /sup 3/H-cholesterol to steroids was examined in excised tissue from the pistils and bracts of Gladiolus. Ovary-ovule and stigma-style tissues produce a compound with chromatographic properties on reverse phase HPLC similar to 17..beta..-estradiol (E/sub 2/). The stigma-style fraction also produced a compound that chromatographed similarly to progesterone. Bracts and the oxidation controls produced no radiolabeled compounds which were chromatographically similar to E/sub 2/. An endogenous E/sub 2/ binding protein was partially characterized from the ovules. The protein binds E/sub 2/, estriol, and diethylstilbesterol whereas testosterone and progesterone do not bind. The total specific binding capacities in the cytosolic and nuclear fractions are 1.6 and 2.2 femtomoles of estradiol per mg of tissue. The dissociation constant is 1.1 x 10/sup -9/ M/sup -1/ for both subcellular fractions. The protein-estradiol complex has a sedimentation coefficient of 4.7 +/- 0.1S. The tissue specific biosynthesis of estrogens and the presence of a steroid binding protein similar to a Type 1 estrogen receptor found in mammals is suggestive of a role for steroids in pistil ontogeny." @default.
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- W75798601 date "1987-04-01" @default.
- W75798601 modified "2023-09-23" @default.
- W75798601 title "Steroid production and estrogen binding in flowers of Gladiolus" @default.
- W75798601 hasPublicationYear "1987" @default.
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