Estimation of endoglucanase and lysozyme effective diffusion coefficients in polysulphone membranes

Theodore Varzakas, Isabel Escudero, Ioannis Economou

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

A diffusion cell and a polysulphone membrane were used for the estimation of the effective diffusion coefficient (D(M)) of endoglucanase and lysozyme. D(M) was calculated from the slope obtained by fitting the amount of protein transferred through the membrane against time using the appropriate mathematical equation for the steady state. Different protein concentrations and pH values were tested. The calculated D(M) for endoglucanase was in the order of 10-13 m2 s-1 whereas the calculated D(M) for lysozyme was an order of magnitude lower. A diffusion coefficient dependence on the concentration and pH was observed. In addition, the partition coefficient, K(M), of the two proteins between the membrane and a solution containing the proteins was calculated. Copyright (C) 1999 Elsevier Science B.V.

Original languageEnglish
Pages (from-to)77-83
Number of pages7
JournalJournal of Biotechnology
Volume72
Issue number1-2
DOIs
Publication statusPublished - 11 Jun 1999
Externally publishedYes

Fingerprint

Polysulfones
Cellulase
Muramidase
Enzymes
Proteins
Membranes
Membrane Proteins
polysulfone P 1700

Keywords

  • Effective diffusion coefficients
  • Endoglucanase
  • Lysozyme
  • Polysulphone membranes

ASJC Scopus subject areas

  • Biotechnology

Cite this

Estimation of endoglucanase and lysozyme effective diffusion coefficients in polysulphone membranes. / Varzakas, Theodore; Escudero, Isabel; Economou, Ioannis.

In: Journal of Biotechnology, Vol. 72, No. 1-2, 11.06.1999, p. 77-83.

Research output: Contribution to journalArticle

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