Abstract
Previous studies have shown that Dictyostelium discoideum spore coat proteins are found in prespore cells, which are localized to the posterior region of migrating slugs, and in the coats of mature spores. Prespore vesicles, identified by morphology and by staining with anti-D. mucoroides spore serum, are also localized in the posterior region of migrating slugs. Using antisera specific to the spore coat proteins, we show that the spore coat proteins are packaged in prespore vesicles. They are present in the vesicles as a complex which can be dissociated by denaturation. The anti-D. mucoroides spore serum reacts with at least five proteins in whole spore extracts including the spore coat proteins SP96 and SP70.
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