Medicago AB Products Are Available Worldwide. For Research Use Only. Tris Buffer Powder is used in many applications within biochemistry and molecular biology laboratories and is a component in TAE and TBE (electrophoresis running buffer). Tris has a slightly alkaline buffering capacity between pH 7.0 and 9.2, which coincides with the typical physiological pH of most living organisms. Tris buffer is a good option for washing procedures in cell culture and is suitable as suspension buffer for biological samples.