C-factor, the product of the csgA gene, is a cell-surface associated short-range intercellular signaling protein in Myxococcus xanthus. C-factor is required for at least four responses during starvation-induced fruiting body morphogenesis: rippling, aggregation, sporulation, and full expression of the csgA gene, all of which fail in a csgA mutant. To analyze the C-factor signaling pathway, eigh...
