AT1g61610 was found to have a Zinniacysteine protease 4 (ZCP4) promoter cis-element-like sequence 1000 b.p. upstream, and the ZCP4 promoter governs tracheary element differentiation (Pyo et al. 2007). The presence of this cis-element-like sequence implicates AT1g61610 in the development of xylem, although nothing further is known to this end. Xylem are the vesicles in plants that transport water up from the roots to the leaves. The development of xylem includes lignification and secondary cell wall formation.
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