k-core analysis is an iterative process in which the nodes are removed 
from the graphs in order of least connected (Wuchty and Almaas, 2005). 
More specifically, for each iteration of k, given the network from the 
previous iteration, genes with less than k connections are removed from 
the graph. This will result in a series of subgraphs that gradually reveal 
the globally central region of the original network. 
 
Wuchty, S. and Almaas, E. (2005) Peeling the yeast protein network. 
Proteomics, 5, 444?49 
 
 Systems Biology and Evolution Toolbox (SBEToolbox). 
 Authors: James Cai, Kranti Konganti. 
 (C) Texas A&sbeG University. 
 
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