Topological parameter Value
Connected components 1
Number of nodes 151
Number of edges 205
Clustering coefficient 0.028
Network diameter 20
Shortest paths 8086 (35%)
Characteristic path length 6.546
Averaged number of neighbours 2.662
In-degree distribution  
γ -1.499
r 0.988
R2 0.884
Out-degree distribution  
γ -1.934
r  0.996
R2  0.818
Avg. Clustering Coefficient Distribution  
γ  -0.454
r 0.183
R2 0.217
The value of connected components measures the number of networks obtained; the number of nodes represent the total number of molecules involved; the number of edges represents the total number of interaction found; the clustering coefficient is calculated as CI = 2nI / k(k −1) where nI is the number of links connecting the kI neighbours of node I to each other; the network diameter is the largest distance between two nodes; shortest paths is the measure of the number (and percentage) of shortest path within the network; the Averaged n° neighbours represent the mean number of connection of each node; the Char. path length gives the expected distance between two connected nodes; γ represent the exponent of power law y = ax, r is the correlation coefficient, R2 the coefficient of determination of power law.
Table 1: Main topological parameters of human spermatozoa capacitation.