Subgraphs of the A. niger data set.

The table summarizes properties of subgraphs of sizes of the empirical A. niger fitness landscape. Second column shows the total number of subgraphs and third column the number of viable subgraphs not containing any non-viable genotypes, with the model prediction (10) given in brackets. Fourth column contains the number of accessible paths that would be present if accessibility were reduced only because of the presence of non-viable genotype, with the model prediction (11) shown in brackets. Finally, the last two columns show the mean number of accessible paths and the probability of no accessible path , respectively, computed from the full subgraph ensemble.