Skip to Content
Merck
  • New zwitterionic detergents improve the analysis of membrane proteins by two-dimensional electrophoresis.

New zwitterionic detergents improve the analysis of membrane proteins by two-dimensional electrophoresis.

Electrophoresis (1998-09-18)
M Chevallet, V Santoni, A Poinas, D Rouquié, A Fuchs, S Kieffer, M Rossignol, J Lunardi, J Garin, T Rabilloud
ABSTRACT

Severe quantitative loss of protein is often observed in high-resolution two-dimensional electrophoresis of membrane proteins, while the resolution is usually not affected. To improve the solubility of proteins in this technique, we tested denaturing cocktails containing various detergents and chaotropes. Best results were obtained with a denaturing solution containing urea, thiourea, and zwitterionic detergents, synthesized for this purpose. Among the dozen detergents synthesized and tested, amidosulfobetaines with an alkyl tail containing 14-16 carbons proved most efficient, solubilizing previously undetected membrane proteins.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
Sodium hydroxide, pellets, semiconductor grade, 99.99% trace metals basis
Sigma-Aldrich
Sodium hydroxide, puriss. p.a., ACS reagent, K ≤0.02%, ≥98.0% (T), pellets
Sigma-Aldrich
Sodium hydroxide, ACS reagent, ≥97.0%, pellets
Sigma-Aldrich
Sodium hydroxide, puriss. p.a., ACS reagent, reag. Ph. Eur., K ≤0.02%, ≥98%, pellets
Sigma-Aldrich
Sodium hydroxide solution, purum, ≥32%
Sigma-Aldrich
Sodium hydroxide, puriss., meets analytical specification of Ph. Eur., BP, NF, E524, 98-100.5%, pellets