We further demonstrate that KD of B55α abolishes the association of the catalytic subunit of PP2A with Eya3 overexpressed in HEK293FT cells (Fig. 4c–e), as well as with endogenous Eya3 in 66cl4 mammary carcinoma cells39 (Fig. 4f–h; Supplementary Fig. 4d,e shows an additional B55α KD) using anti-PP2A-C and Eya3 antibodies. Here, PTPA is linked to breast carcinoma.