Blocker™ Casein in PBS or TBS are ready-to-use, solutions of purified casein protein for blocking steps in Western blot, ELISA, IHC and nucleic acid detection methods.

• Easy to use
• Safe, stable and thimerosal-free formulations
• Purified casein provides fewer chances of cross reaction
• Flexible and available in PBS and TBS formulations

This blocking buffer contains casein protein that is purified from milk by the Hammarsten method. The phosphate and Tris-buffered saline formulations are used for blocking excess binding sites on membranes and microplates in antibody based detection methods. Blocker Casein buffers are 1% (w/v) casein, which corresponds to the optimal concentration for most applications.