Words similar to scale-free

Example sentences for: scale-free

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Protein-protein interactions form scale-free networks, which show the characteristic power-law distribution of the node degrees; simply put, there is a small number of highly connected proteins (hubs), whereas the majority have a small number of partners (the most abundant class are proteins that are involved in just one interaction) [ 13 14 ] . Scale-free networks are highly tolerant to error (elimination of nodes at random) but are vulnerable to attack, i.e. elimination of the hubs [ 15 ] and, indeed, it has been found that the most highly connected proteins in yeast interaction networks tend to be essential [ 13 ] . This might explain the present findings, namely that a small number of yeast protein-protein interaction hubs evolve slowly due to strong purifying selection, whereas, for the great majority of the proteins, there is no discernible connection between the number of interactions and evolutionary rates.