Copyright information:Taken from "The mosaic structure of the symbiotic plasmid of CFN42 and its relation to other symbiotic genome compartments"Genome Biology 2003;4(6):R36-R36.Published online 13 May 2003http://www.ncbi.nlm.nih.gov/pmc/articles/PMC193615.Copyright © 2003 González et al.; licensee BioMed Central Ltd. This is an Open Access article: verbatim copying and redistribution of this article are permitted in all media for any purpose, provided this notice is preserved along with the article's original URL. p42d; MAFF303099 SGC; pNGR234a; R7A SGC; SGC; pSymA. The color bars indicate the position of the genes. The nodulation genes are represented in blue, and the nitrogen-fixation genes and are represented in yellow.