the upsc consists of 9 to 11 members besides the chairman.
the upsc consists of 9 to 11 members besides the chairman.
the upsc consists of how many members besides the chairman?
9 to 11
Na
Na
a receptor for tomato systemin was identified as a 160kda leucine-rich repeat receptor like kinase (lrr-rlk), sr160. after being isolated it was found that was very similar in structure to bri1 from "a. thaliana", the receptor that brassinolides bind to on the cell membrane. this was the first receptor which was found to be able to bind both a steroid and a peptide ligand and also to be involved in both defensive and developmental responses. recent studies have found that the initial conclusion that bri1 is the receptor for tomato systemin may be incorrect. in "cu3" mutants of tomato, a null allele with a stop codon present in the extracellular lrr domain of bri1 prevents the receptor from being localised correctly and it also lacks the kinase domain, required for signalling. these mutants are insensitive to brassinolide yet still respond to tomato systemin by producing protease inhibitors and causing an alkalisation response. this led holton "et al." to suggest that there is another mechanism by which systemin is perceived. further investigation showed that binding of systemin to bri1 does not cause the receptor to become phosphorylated, as when brassinolides bind, suggesting that it does not transduce a signal. when bri1 is silenced in tomato, the plants have a similar phenotype to "cu3" mutants yet are still able to respond normally to systemin, strengthening the view that bri1 is not the systemin receptor.
systemin