Abstract:Germinal-vesicle-breakdown (GVBD) was induced if a 132,000-g supernatant of Tetrahymena thermophila homogenates was injected into Xenopus oocytes. Using this induction of GVBD as a bioassay system, a GVBD-inducing substance was purified from the Tetrahymena by ultra-filtration, liquid chromatography, and electroelution from a band on native-PAGE gel. Proteins eluted from the single band on the native-PAGE gel induced GVBD in the absence of oocyte protein synthesis. This band resolved into two bands on SDS-PAGE… Show more
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