Fig. 2. Subcellular localization of RACK1 and the autophosphorylated forms of PKC/PKCßII. (A,B) RACK1 (A) and PKC/PKCßII (B) in wing bud mesenchymal cells of a stage 16/17 embryo. (C,D) PKC/PKCßII in a mesenchymal cell from an ectopic nascent bud that developed from lateral plate treated with FGF4 (C) and in a cell on the contralateral side of the same embryo (D). In A-C, black arrows point at molecules at the nuclear pore; these areas are enlarged in the inserts. Arrowheads in C,D indicate clusters of gold particles. White arrows point to the nuclear envelope. C, cytoplasm; N, nucleus.