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Numerous vendors provide restriction enzymes for use in molecular biology.
Although label specifications are similar from vendor to vendor, enzyme quality may vary substantially. Often researchers select their restriction enzymes based on the lowest price or vendor image without benefit of performance or value comparisons. The purchase and use of an unreliable restriction enzyme can be costly and lead to failed experiments and lost time. At Promega we strive to provide a consistent, high quality product that the customer can rely on every time. In order to provide the highest quality possible, Promega is continually testing its restriction enzymes using strict quality control standards and restriction enzyme reassay and stability testing programs.