UNIT 14.1 Analysis of Disulfide Bond Formation
Published Online: 1 MAY 2001
Copyright © 2003 by John Wiley and Sons, Inc.
Lab Protocol Title
Current Protocols in Protein Science
How to Cite
Braakman, I. and Hebert, D. N. 2001. Analysis of Disulfide Bond Formation. Current Protocols in Protein Science. 3:14.1:14.1.1–14.1.15.
- Published Online: 1 MAY 2001
- Published Print: MAR 1996
In this unit, protocols are provided for detection of disulfide bond formation in cultures of intact cells and in an in vitro translation system containing isolated microsomes. First, the newly synthesized protein of interest is biosynthetically labeled with radioactive amino acids in a short pulse. The labeled protein is then chased with unlabeled amino acids. At different times during the chase, a sample is collected, membranes are lysed with detergent, and the protein is isolated by immunoprecipitation, as described. A support protocol is provided for analysis of disulfide bonds in the immunoprecipitates by SDS-PAGE with and without prior reduction. The difference in mobility observed between the gels with unreduced and reduced samples is due to disulfide bonds in the unreduced protein.