Two-component regulatory systems responsive to environmental stimuli share strongly conserved domains with the nitrogen assimilation regulatory genes ntrB and ntrC.
Proc Natl Acad Sci U S A. 1986 Oct;83(20):7850-4. doi: 10.1073/pnas.83.20.7850.
Proc Natl Acad Sci U S A. 1986.
PMID: 3020561
Free PMC article.