Extraction buffer
Use ultrapure urea (e.g., ICN Biomedicals). Urea solutions should be freshly deionized using analytical-grade mixed bed resin, AG 501-X8 (D) from Bio-Rad.
50 mM Tris-HCl (pH 7.4)
5 mM EGTA
Use ultrapure urea (e.g., ICN Biomedicals). Urea solutions should be freshly deionized using analytical-grade mixed bed resin, AG 501-X8 (D) from Bio-Rad.
50 mM Tris-HCl (pH 7.4)
5 mM EGTA