An excitable Rho GTPase signaling network generates dynamic subcellular contraction patterns gan Graessl, M, Koch, J, Calderon, A, Kamps, D, Banerjee, S, Mazel, T, Schulze, N, Jungkurth, J, Patwardhan, R, Solouk, D, Hampe, N, Hoffmann, B, Dehmelt, L, Nalbant, P