Table 1. Estimation of the neighbourhood coefficient.

Data set	Neighbourhood
Figure 3	(4.2 ± 0.4) × 10–3
Figure 1, all replicates	(3.8 ± 0.6) × 10–3
Figure 1, replicate 1	(4.7 ± 0.5) × 10–3
Figure 1, replicate 2	(3.7 ± 0.8) × 10–3
Figure 1, replicate 3	(4.3 ± 0.5) × 10–3

The coefficient was determined by means of linear regression analysis as described in the Appendix. The estimation was performed for different sets of data: the first set refers to the model experiment (Fig. 3); the second set refers to the three replicates used in the actual experiment (Fig. 1). The subsequent sets refer to one replicate each.