Tris-glycine buffer (TG) is the most common running buffer in
native (non-denaturing) homogeneous and gradient polyacrylamide
gel electrophoresis (PAGE) of proteins. Tris-glycine
gels resolve proteins by size. However, very small proteins and
peptides do not resolve well due to interference from the glycine/
pH discontinuity front.
TG buffer is also used to make Tris-glycine/20% methanol
Western transfer buffer, which is the most frequently used
protein transfer buffer for wet blot transfers.
Tris-glycine-SDS buffer (TG-SDS) contains the denaturing agent
sodium dodecyl sulphate (SDS). Protein electrophoresis under
denaturing conditions (SDS-PAGE) involves separating proteins
based on their size. By treating the sample under denaturing and
reducing conditions with SDS, proteins unfold and become
coated with SDS detergent molecules.
Medicago’s TG and TG-SDS buffer are supplied as pre-weighed
powder mixes in sealed pouches giving 1000 ml or 5000 ml of
0.025 M Tris, 0.192 M glycine with pH 8.3 at 25°C and 0.025 M
Tris, 0.192 M glycine, 0.10% SDS with pH 8.3 at 25°C.
Applications
• Protein electrophoresis
• Denatured protein electrophoresis
• Polyacrylamide gel electrophoresis
• Western blotting