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The binding of cationized ferritin at the surfaces of ehrlich ascites tumor cells: The effect of pH and glutaraldehyde fixation
Author(s) -
Subjeck J. R.,
Weiss L.
Publication year - 1975
Publication title -
journal of cellular physiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.529
H-Index - 174
eISSN - 1097-4652
pISSN - 0021-9541
DOI - 10.1002/jcp.1040850304
Subject(s) - glutaraldehyde , neuraminidase , ferritin , internalization , fixation (population genetics) , biophysics , chemistry , biochemistry , cell , microbiology and biotechnology , nuclear chemistry , chromatography , biology , enzyme , gene
The densities of cationized ferritin (CF) particles binding to the surfaces of cultured Ehrlich ascites tumor cells were determined at pH 7.4, where the ferritin stain was applied either prior to or following glutaraldehyde fixation. The densities were also determined with CF adjusted to pH 1.9 and applied after fixation. For all fixed samples there was a higher density of particles bound to microvilli than to the spaces between them. Treatment with neuraminidase removed more particles from microvilli than from the intermicrovillus spaces, but did not reduce the levels of binding to the same value. When cationized ferritin is applied prior to fixation, an aggregation of the CF particles at the cell surface was observed, with the internalization of some clusters. This effect was independent of neuraminidase treatment.