Internal binding sites for MSH: analyses in wild-type and variant Cloudman melanoma cells.

Abstract excerpt

Cloudman S91 mouse melanoma cells express both external (plasma membrane) and internal binding sites for MSH. Using 125I-beta melanotropin (beta-MSH) as a probe, we report here an extensive series of studies on the biological relevance of these internal sites. Cells were swollen in a hypotonic buffer and lysed, and a particulate fraction was prepared by high-speed centrifugation. This fraction was incubated with...

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