Fig. 3.
Analysis of fractions from Ni-column chromatography.
Three fractions of wash buffer and 5 fractions of 250 mmol/L imidazole on 0.5 mol/L NaCl fractions of eluate were collected. (A) 10 μL were loaded onto a 10% SDS-PAGE gel and stained with Coomassie blue. (B) 10 μL was loaded on SDS-PAGE, transferred, and detected with anti-PDE3A polyclonal antibody as described in “Materials and methods.”