Endogenous proteolysis of the human erythrocyte membrane as studied by two-dimensional gel electrophoresis and electron spin resonance

Pavel S. Gromov, Sergey F. Zakharov, Sergey S. Shbhkin, Maria Gaczynska, Grzegorz Bartosz, Ewa Grzelinska

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3 Scopus citations


1. 1. Endogenous proteolysis in human erythrocyte membranes was studied in human erythrocyte membranes incubated at 37°C by monitoring changes in 2-D electrophoretic pattern of membrane polypeptides and in the spectra of maleimide-spin labeled membranes. 2. 2. A strong effect of exogenous proteases derived from contaminating other blood elements was found, resulting in formation of specific spots on 2-D electropherograms, requiring very careful leukocyte removal in investigations of red cell membrane protein composition and proteolysis. 3. 3. Studies of the effects of protease inhibitors and Ca2+ confirmed a complex pattern of endogenous red cell membrane proteolysis ("self-digestion") involving many substrates and enzymes. 4. 4. A promoting effect of high concentrations (150mM) of Ca2+ on endogenous red cell membrane proteolysis was found.

Original languageEnglish (US)
Pages (from-to)941-945
Number of pages5
JournalInternational Journal of Biochemistry
Issue number8
StatePublished - 1989


ASJC Scopus subject areas

  • Biochemistry

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