Protein expression and purification

Get tips on using Ni-NTA Agarose to perform Protein expression and purification Insect cells - Hi5 TYR

Get tips on using IEF and 2-D Protein Standards to perform Protein Ladder IEF and 2-D Standards

Get tips on using pET-21a(+) DNA to perform Protein expression and purification Bacteria - Escherichia coli Prefoldin (PFD)

Get tips on using pQE-80L vector to perform Protein expression and purification Bacteria - Escherichia coli IFABP-Aβ

Get tips on using pPIC9K Pichia Vector to perform Protein expression and purification Yeast - Pichia pastoris N-APP

Get tips on using pGEX-6P-1 Vector to perform Protein expression and purification Bacteria - Escherichia coli FleN

Get tips on using pQE-30 Xa Vector to perform Protein expression and purification Bacteria - Escherichia coli Siva1

I am currently using a recombinant protein which shows metal-dependent DNase activity. Is it possible to pinpoint the source of the DNase activity after protein purification? More specifically, can I ensure that the DNase activity is not because of nuclease contamination from the E.coli that might have persisted and passed with the protein of interest during purification?

Get tips on using Freedom™ DG44 Kit to perform Protein expression and purification Mammalian cells - CHO-K1 G12