We always use scRNA-Seq **data** normalized on a log-scale, in order to stabilize the variance of highly expressed genes. Because the stochastic matrix involves a ratio of gene-expression values, one needs to avoid zero values in the **data** matrix, so it is necessary to use a pseudocount of 1.1, so that the log(counts+1.1) transformation takes on a minimum value above zero. Details of the scRNA-Seq **dataset**s and the normalization procedure used in each one are available in Supplementary Information.