Figure 5.
Phosphorylation status of PTPα proteins. Anti-HA immunoprecipitates from lysates from Neo (control) or PTPα793 or PTPα802 overexpressor cells (induced for 20 h) were divided into four aliquots and immunoblotted with anti-PTPα antibody (panel a), anti-phosphoY789 antibody (panel b), anti-phosphoS180/phosphoS204 antibody (panel c) or anti-phosphoS204 antibody (panel d). No signals were detected with control anti-HA immunoprecipitates from Neo control cells. The ratios between phosphorylation of PTPα793 and PTPα802 at pY789, pS180/pS204 and pS204 were 1.1 ± 0.1, 1.0 ± 0.1 and 1.1 ± 0.1, respectively (n = 4; errors are SEMs). The positions of molecular weight markers (in kDa) are indicated.