Abstract
It has been shown that illumination of plant seedlings or plant tissues causes an increase of NADP and a decrease of NAD (Muto et al., 1981). So far, NAD kinase (AMP:NAD 2′- phosphotransferase; EC 2.7.1.23) has been the only enzyme which is known to catalyzes the phosphorylation of NAD to NADP. Therefore a light-dependent activation of the NAD kinase has been postulated. In 1972 Tezuka and Yamamoto reported that NAD kinase activity in cell free extracts from peas is photoregulated via phytochrome. However, these results could not be verified later (Hopkins and Briggs, 1973). Since hitherto no evidence for a photoregulation of the enzyme could be demonstrated another mechanism of regulation has to be postulated.
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.
