They combined
the phytoene synthase gene from maize with crt1 from the original golden rice.
She discovered that the enzyme made by
the phytoene synthase was the «bottleneck» in production.
One, called
phytoene synthase, had been taken from daffodils.
To produce Golden Rice, 2 enzymes are introduced into the endosperm [
phytoene synthase (psy) and phytoene desaturase (crtl)-RSB- via an endosperm - specific glutelin (Gtl) promoter (15), to establish a β - carotene biosynthetic pathway in the rice grains.
She discovered that the enzyme made by
the phytoene synthase was the «bottleneck» in production.
ZmPSY1 —
phytoene synthase from another food crop, maize, which catalyzes the condensations of two molecules of geranylgeranyl diphosphate to form 11 - cis - phytoene, the first committed step in the carotenoid biosynthetic pathway;