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  • FAQ: How is Proteinase K, Molecular Biology Grade (P8107) different from the previous Proteinase K product (P8102)?

    The new Proteinase K, Molecular Biology Grade product (P8107) is sold by activity (at 800 U/ml) whereas the previous Proteinase K product (P8102) was sold by mass. By providing P8107 by activity, any lot-to-lot activity variations that can occur when selling a product by mass are dramatically reduced. In addition, the new product is subject to an increased number of quality controls (e.g., Eukaryotic DNA Contamination, Single Stranded DNase Activity, etc.) to ensure that it is appropriate for a wider variety of applications.