Before revision:  The findings suggest that, while PPI networks have properties that differ from their expected values in their randomized versions with great statistical significance, the differences for metabolic networks have a smaller statistical significance, though it is possible to identify some drift . We also investigate the quality of fits obtained for the nodes degree distributions to power-law functions. The fits for the metabolic networks do describe the distributions if one disregards nodes with degree equal to one, but in the case of PPI networks the power-law distribution poorly describes the data except for the far right tail covering around half or less of the total distribution .
After revision:  The findings suggest that, while PPI networks have properties that differ from their expected values in their randomized versions with great statistical significance, the differences for metabolic networks have a smaller statistical significance, though it is possible to identify some drift .