Genes Present in APoGE for Cluster AG132. Genes present in APoGE for Cluster AG132 show a similar pattern in embryonic brain and ventral nerve cord. All embryos are viewed ventrally. (2a) dock has a key role in axon guidance . (2b) Cam has been implicated in photoreceptor light termination, muscle synapses and midline crossing . (2c) Gbeta13F mutants have neuroblasts defects . (2d) Brat is reported as involved in the regulation of cellular rRNA. Genes (2f) to (2m) are genes of unknown function with a similar pattern of expression.