Can I store the 1X solution of the Halt Protease and Phosphatase Inhbitor Cocktail and if so, for how long?
The stability of the 1X solution is undetermined. For best results, prepare solutions just before use. The 100X concentrate is stable for at least one year stored at 4 degrees C.
Do you offer the components of the Halt Protease and Phosphatase Cocktail individually?
Yes. Halt Protease, Halt Phosphatase and Protease/Phosphatase combined Inhibitor Cocktails are available. In addition, some of the individual inhibitors of the Halt Protease and Phosphatase Inhibitor Cocktail are offered separately.
When do I need to add EDTA when using the Halt Protease and Phosphatase Cocktail?
EDTA chelates the metal ions required for metalloprotease activity. Add EDTA if metalloproteases are likely to adversely affect target protein function; however, avoid using EDTA when the downstream application involves metal chelate affinity purification or the target protein requires metals for proper function.
How much of the Halt Protease and Phosphatase Cocktail do I use for my sample?
The Halt Protease and Phosphatase Cocktail is supplied at a 100X concentrate and is used at 1X. For example, add 10µL of 100X Halt Cocktail to 1mL of sample. Some samples, however, contain high levels of proteases or phosphatase and might require a more concentrated treatment (i.e., 2-3X).