Protein quantification Mammalian cells

Get tips on using Mouse Retinol Binding Protein 4 ELISA Kit (ab202404) to perform ELISA Mouse - RBP4

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 anti-p62 Protein, C-Terminal Specific Polyclonal Antibody to perform Autophagy assay cell type - MDA-MB-231

Get tips on using Lipofectamine® 2000 Transfection Reagent to perform DNA transfection Mammalian cells - Primary cells Rat mesangial cells

Get tips on using FuGENE® HD Transfection Reagent to perform DNA transfection Mammalian cells - Primary cells Rat mesangial cells

Get tips on using Lipofectamine™ 3000 Transfection Reagent to perform DNA transfection Mammalian cells - Primary cells Rat schwann cells

Get tips on using Lipofectamine® 2000 Transfection Reagent to perform DNA transfection Mammalian cells - Primary cells Human prenatal cardiac progenator cells