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Interaction of Shox2a with the δ isoform (Ppp2r5d) of B56 regulatory subunit of protein phosphatase 2A (PP2A). A, Shox2a interacts with Ppp2r5d determined by yeast mating. The whole sequence of Shox2a, except the 14‐amino acid motif (OAR) at the C‐terminus, is essential for interaction with PP2A. B, Z‐protein pull‐down demonstrates physical interaction of Shox2a, but not Shox2b, with Ppp2r5d. OAR indicates opt, aristaless, rax.
