during swarmer cell differentiation in caulobacter crescentus , morphogenesis at the swarmer pole is characterized by the loss of the flagellum , by the loss of phage receptor activity ( pra ) ( the ability of the cell to adsorb phage phi cbk ) , and finally by the initiation of stalk outgrowth at the site formerly occupied by the flagellum and the pra .
C0007589
cell differentiation
C0007634
the