Organization and partial sequence of a DNA region of the Rhizobium leguminosarum symbiotic plasmid pRL6JI containing the genes fixABC, nifA, nifB and a novel open reading frame. - Petra Grönger; Sundaram S. Manian; Helmut Reiländer; Michael O'Connell; Ursula B. Priefer; Alfred Pühler (Nucleic Acids Res., 1987)