Pom1 gradients decay length decreases with the amplitude at the pole. Each dot corresponds to one average profile as in (C). The trans-phosphorylation model predicts a slope of -1/2 in log-log space (red line), close to the observed linear regression of -0.52 (black line) and well within the two SE confidence interval (shaded area). Each data point is weighted by its inverse variance of the mean in the linear regression. 