To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Movie 2 pkaC null cells exposed to an exponential gradient of cAMP created by a point source (micropipette). Corresponds to the chemotaxis analysis of pkaC null cells in Fig. 1B, 1C. Protein kinase A regulates the Ras, Rap1 and TORC2 pathways in response to the chemoattractant cAMP in Dictyostelium Margarethakay Scavello, Alexandra R. Petlick, Ramya Ramesh, Valery F. Thompson, Pouya Lotfi, and Pascale G. Charest J Cell Sci 2017. 130:1545-1558; doi: 10.1242/jcs.177170 Download Original Video