Fig.4 Strictinin inhibits tyrosine phosphorylation of STAT6. 
DND39 cells were treated with strictinin (0, 25, 50, and 100 μM) in the presence of IL-4 for 30 min as indicated. STAT6 was immunoprecipitated, separated on a 8% SDS-PAGE, and immunoblotted with the anti-phosphotyrosine antibody. Shown in the lower panel are protein levels from the same filter blotted again with the anti-STAT6 antibody.