Phytochelatins (Pcs) protect plant enzymes from trace-metal poisoning. Which of the following is not correct about phytochelatins?
1
Phytochelatin was first discovered in 1981 in fission yeast.
2
Phytochelatins are oligomers of glutathione.
3
They are produced by the enzyme phytochelatin synthase.
4
In metal tolerant strains, PCs are accumulated at lower levels.