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Symposium. Cell interactions in sexual phenomena
Published online by Cambridge University Press: 19 September 2011
Extract
The first paper of this symposium was presented by Y. Tsukii (Hosei, Univ.) under the title of ‘Genes controlling the specificity of mating type and matingtype-substance interactions in Paramecium.’
Sexual reproduction in the ciliate Paramecium caudatum is initiated by ciliary agglutination (mating reaction) between cells of complementary mating types, E and O. This initial cell contact involves specific macromolecules called the ‘mating-type substances’, proteins associated with ciliary membranes. Although they have eluded all attempts at isolation, genetic approaches are disclosing their structural characteristics.
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