Casein Peptone is an enzymatically hydrolyzed casein powder refined to remove impurities. Casein Peptone 2400 is clear in solution and can be used in the formulation of microbiological media, cell and tissue culture media. The casein used in this product is sourced from New Zealand and only enzymes of microbial origin are used to produce this casein peptone. This casein peptone is available certified Kosher.