e. For mapping experiments, the cell monolayer sample was moved in 1-mm raster steps under the laser focus covering an area of 30 3 30 mm2 . The experimental system is described in more detail in Ref. 9.
e. Formapping experiments, the cell monolayer sample wasmoved in 1-mm raster steps under the laser focus coveringan area of 30 3 30 mm2. The experimental system isdescribed in more detail in Ref. 9.