Fig. 2.
Mono-Q-Sepharose separation profiles of whole extracts from normal (A) and PV (B) day-6 ECFC. Approximately 2 mg of whole cell extracts were loaded onto the column. PTP activity was measured with 32P-labeled ENDYINASL as a substrate and data are expressed as cpm obtained from 2 μL of each 0.5-mL fraction eluted from the column. Solid lines represent PTP activity; dashed lines denote NaCI gradients. (Insets) Western blot analyses of corresponding fractions with anti–SHP-1 and anti-CD45 antibodies. A representative figure from four experiments with similar results is shown. Each experiment was performed with blood samples from different normal volunteers and PV patients.