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Purification of fusion proteins expressed by pEX3 and a truncated pEX3 derivative
C H Kocken1, J M Scheer, G W Welling
1Rijksuniversiteit Groningen, Laboratorium voor Medische Microbiologie, The Netherlands.
FEBS Letters
|August 15, 1988
Abstract:
A derivative of the pEX3 expression vector was constructed that codes for the first 407 amino acids of the 1051 amino acids of the pEX3 fusion protein. The amount of truncated fusion protein (40 mg/g cells), obtained by expression in E. coli, was similar to that produced by the original pEX3 vector. The truncated fusion protein was purified more easily from E. coli contaminants than the original fusion protein by washing with 2 M urea and 0.5% Triton X-100.