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Expression of Cdc42 proteins. Embryos expressing Cdc42 proteins were examined with α-myc immunocytochemistry in hour 12 embryos. A, Localization of the protein can be seen throughout the SNb growth cones and within individual processes (arrows). B, In the LBD neuron, the protein is localized to the growing axon (arrowhead). Apparent discrepancies in expression level can be attributed to the protein localizing to the growth cone, which is much larger in the case of SNb. Scale bar, 5 μm.
