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. 2020 Jun 5;11:741. doi: 10.3389/fpls.2020.00741

FIGURE 1.

FIGURE 1

Condensed overview of CK-related metabolic mechanisms in Arabidopsis cell. CK metabolic enzymes: green – biosynthesis, red – degradation, blue – conversion. IPT, isopentenyltransferase; UGT, UDP-glucosyltransferase; LOG, Lonely Guy, CK phosphoribohydrolase; CYP735A, cytochrome P450 mono-oxygenase; APT, adenine phosphoribosyltransferase; ADK, adenosine kinase; CKX, cytokinin oxidase/dehydrogenase. Pink – possible plasma membrane transporters: PUP, purine permeases; ENT, equilibrative nucleoside transporters; ABC, ABC transport proteins. Orange mark: AHK, Arabidopsis histidine kinase; ER, endoplasmic reticulum. Bold: CK metabolites; bold underlined: dominant CK metabolites. Based on the data published in Moffatt et al. (2000), Werner et al. (2003), Kasahara et al. (2004), Takei et al. (2004), Galuszka et al. (2007), Lizák et al. (2008), Kuroha et al. (2009), Zhang et al. (2013), Jiskrová et al. (2016), and Romanov et al. (2018).