Fig. 4From: The genome of Ensifer alkalisoli YIC4027 provides insights for host specificity and environmental adaptationsArrangement of nodulation genes in E. alkalisoli YIC4027, E. fredii strains NGR234, HH103, and USDA257. Black arrows represent structural genes involved in NF synthesis. White arrows indicate genes involved in the transcriptional regulation of NFs. Gray arrows represent nonfunctional nodulation genes (truncated or mutated genes)Back to article page