We have analyzed linear clusters of cells connected by smooth and tight junctions by using a ( z , φ ) parameterization which describes a surface by { x = g ( z ) cos ϕ, y = g ( z ) sin ϕ, z } . The construction starts from a dimer shape that resembles the shape of the epithelial cells like MDCK (Madin-Darby Canine Kidney) cells. An example of such shape, displayed in figure 4, extends from − z max to z max and it can be decomposed in three parts: the left cap ( − z max ≤ z ≤ − z$_{1}$ ), the central part ( − z$_{1}$ ≤ z ≤ z$_{1}$ ), and the right cap ( z$_{1}$ ≤ z ≤ z max ). At position ± z$_{1}$ the shape function has its maximum. An m -cell linear cluster is ob- tained by repeating the central part m − 1 times and it extends from − L$_{m}$ to L$_{m}$ , where L$_{m}$ = z max + ( m − 2) z$_{1}$ . Mathematically, the shape is described by: where mod( x , y ) is the remainder of the division of x by y . For the examples considered here, the dimer shape function is: with z max = 1 . 77377 and z$_{1}$ = z max / 2. Tables I and II list the most representative dipole-active eigenmodes for a trimer in perpendicular and parallel fields. Only the parallel field configuration has a dipole-active eigenvalue close to 1/2, with a relatively small weight. The results for linear clusters of up to four particles are displayed in Figure 5. The elec- tric parameters are the same as ones used for dimers in the previous section. An additional, distinct low-frequency relaxation emerges for clusters with more then one particles, only when the stimulus field is parallel with the symmetry axis. The relaxation frequency de- creases, while the intensity of these relaxations increases, as the number of cluster members increases. This behavior is explained again by the combination of eigenvalues close to 1/2, with thin non-conductive layers covering the cluster and is consistent with experimental data on ischemic tissues [11], which reports that the cell separation (closure of gap-junctions) is responsible for decrease and eventual disappearance of the low-frequency dispersion. 18 g$_{m}$ ( z ) =      g ( z + ( m − 2) z$_{1}$ ) , for − L$_{m}$ ≤ z ≤ − L$_{m}$ + z max g (mod( z + (1 + ( − 1) $^{m}$) z$_{1}$/ 2 , 2 z$_{1}$ ) − z$_{1}$ ) , for − L$_{m}$ + z max ≤ z ≤ L$_{m}$ − z max g ( z − ( m − 2) z$_{1}$ ) , for L$_{m}$ ≤ z ≤ L$_{m}$ − z max , (37) g ( z ) = 0 . 01 + 2 . 32317 z 2 − 11 . 9862 z 4 + 40 . 4045 z 6 − 74 . 2226 z 8 + 79 . 142 z 10 − 51 . 8929 z 12 + 21 . 3096 z 14 − 5 . 35113 z 16 + 0 . 752147 z 18 − 0 . 045375 z $^{20}$, (38)