Figure 2.

Venn diagram scheme for prediction of putative self-assembling protein families based on genomic context. Each circle is intended to illustrate a criterion used for selection. Proteins were filtered for families that match all three criteria depicted: compactness, multiple members per operon and occurrence of multiple members per operon in three or more organisms. Arrows represent open reading frames (ORFs). Each cluster of ORFs in a row represents a genomic region from one organism. [Color figure can be viewed in the online issue, which is available at www.interscience.wiley.com.]