Heterodimerization of AtDPBFs. Dimerization between AtDPBFs was examined by EMSAs, using cotranslation products of AtDPBFs and the Dc3 PPR. A, Dimerization between AtDPBF-1, -3, and -4. B, Dimerization between AtDPBF-2 and other AtDPBFs. Numbers above each lane indicate corresponding AtDPBFs. d, Deletion constructs of AtDPBFs (see text and “Materials and Methods”). Shifted bands with intermediate mobility are highlighted by arrows. FP, Free probe.