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Transformation-dependent effect of dibutyryl cyclic AMP on surface properties of rat cultured cells.

摘要:

The possible differential effect of dibutyryl cyclic AMP on the surface properties of ts-NT3-KR rat cells that express a normal phenotype at 37 degrees C and a transformed morphology and behavior at 33 degrees C has been studied. Electrophoretic examination of glycosylated macromolecules revealed a 350,000 dalton glycoconjugate in phenotypically normal cells but not in the corresponding samples from phenotypically transformed cells or in phenotypically "normal" cells rounded by exposure to the cyclic nucleotide. A decreased exposure of a major 100,000 dalton surface component characteristic of cells that expressed a transformed phenotype, was observed when the corresponding cultures were exposed to dibutyryl cyclic AMP. No change in the 230,000 dalton fibronectinlike molecule of phenotypically normal cells was apparent even in the corresponding cultures exposed to the cyclic nucleotide.

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