Abstract
Human pancreatic exocrine adenocarcinoma cells established in tissue culture expressed both HLA and beta 2-microglobulin (beta 2M). Plasma-membrane components of this pancreatic cancer cell line were purified from plasma membrane fractions enriched by sucrose density-gradient centrifugation, using immunoaffinity chromatography on immobilized anti-human beta 2M antibody. Both rabbit and mouse monoclonal anti-beta 2M IgG were used, with a 20--25-fold overall purification of 5'-nucleotidase. The method was applicable to 5 x 10(7) cells and permitted the solubilization of membranes retained on the column, with the selective desorption of components not associated with beta 2M before the subsequent elution at pH 3 of beta 2M-associated macromolecules. The acid eluate contained one major and two minor bands in the 40--45,000 mol.-wt range with two additional enriched components of 18,000 and 22,000 dalton. A major carbohydrate-containing component of high mol. wt was also found to be associated with the pancreatic cancer-cell plasma membrane.
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Påhlman, S., Ljungstedt-Påhlman, I., Sanderson, A. et al. Isolation of plasma-membrane components from cultured human pancreatic cancer cells by immuno-affinity chromatography of anti-β2M sepharose 6MB. Br J Cancer 40, 701–709 (1979). https://doi.org/10.1038/bjc.1979.250
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DOI: https://doi.org/10.1038/bjc.1979.250