Protein Homology Network, data visualization by Alex Adai, Institute for Cellular and Molecular Biology – University of Texas, 2002

“The network summarizes the results of aprox. 92 billion pairwise amino acid sequence alignments between 289,069 proteins from 90 genomes. The final network is composed of 27,325 connected sets summing to 7,940,873 edges. An edge is colored blue if it connectes 2 proteins from the same species, and red if it connects 2 proteins from 2 different species. If that information is not available the edges are colored based on layout hierarchy.”

via Visual Complexity