Fig. 5. 1D implementation of the model in a long narrow fragment of length 2L. Two dynamic sub-populations of MTs with opposite orientations are characterized by the densities of the plus (pr,l) and minus (mr,l) ends and the polymer densities Nr,l. Three pigment sub-populations are described by the densities of the granules gliding to the right (gr) and left (gl) with speed vg, and static granules (gs) dissociated from the MTs.