Figure 10.

A unique M. tuberculosis gene linked to a glutamine synthetase paralog. Few homologs of Rv1879 exist in prokaryotes, but some plants and certain fungi contain a fusion protein containing domains homologous to both Rv1879 and to glutamine synthetase. The Operon and Rosetta Stone linkages suggest a possible role for Rv1879, and a possible functional association with the glnA3 gene product.