Before revision:  The focus of the analysis is, apart from the description of the main properties of the graphs, to identify those properties that deviate from the expected values had the networks been build by randomly linking nodes with the same degree distribution.
After revision:  First, we investigate the quality of fits obtained for the nodes degree distributions to power-law functions. This analysis suggests that a power-law distribution poorly describes the data except for the far right tail in the case of PPI networks. Next we obtain descriptive statistics for the main graph parameters and try to identify the analysis is, apart from the description of the main properties of the graphs, to identify those properties that deviate from the expected values had the networks been build by randomly linking nodes with the same degree distribution.