Abstract
Cell-free extracts of Cyanidium caldarium grown on glutamate as the sole nitrogen source, contain at least twice the nitrate reductase activity present in extracts from nitrate-grown cells. Ammonia or ammonia plus nitrate-grown cells do not contain enzyme. However, after nitrogen starvation, they attain very high levels of activity. The enzyme formed in glutamate-grown cells, like the enzyme found in nitrogen-starved cells, is almost totally active, in contrast to the enzyme formed in nitrate-grown cells which is 58% latent. The role of the nitrogen source in the regulation of nitrate reductase activity is discussed.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
