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Rice has two POR isoforms, OsPORA and OsPORB.
Rice contains two POR proteins, OsPORA and OsPORB, which have distinct functions during leaf growth.
The two POR isoforms in barley are distinct, although the enzymatic activities of HvPORA and HvPORB in vitro are similar (Holtorf et al. 1995).
The amino acid sequences of OsPORA and OsPORB, the two POR isoforms in rice, are remarkably similar, and POR enzymes are highly conserved among angiosperms (Sakuraba et al. 2013).
For example, in the angiosperm Arabidopsis thaliana, two POR isoenzymes, PORA and PORB, accumulate in dark-adapted seedlings in concert with increasing levels of the pigment substrate Pchlide.
One might speculate that regulatory or functional schemes unique to each of the new endosymbiont's two por genes favored the retention of these new por genes.
Similar(50)
In Arabidopsis, the functions and expression patterns of AtPORA and AtPORB are analogous to those of the two PORs in barley (Armstrong et al. 1995; Runge et al. 1996).
Within the Pelagophyceae, Aureococcus anophagefferens and Pelagomonas calceolata both lack LIPOR and each possesses two pors, whereas Aureoumbra lagunensis possesses LIPOR genes and maintains just one por gene.
Similarly, within the Raphidophyceae, Heterosigma akashiwo lacks LIPOR but maintains two pors whereas Chattonella subsalsa maintains LIPOR genes and possesses just one por gene.
(d) CjCas9 cleavage activities (% indels) on the three POR targets with or without the assistance of SpdCas9.
On six POR targets we surveyed in K562 cells, NcCas9 was unable to cleave any of them by itself.
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