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Volume 9, Issue 3, Pages 317-319 (March 2016)
Plant H+-PPases: Reversible Enzymes with Contrasting Functions Dependent on Membrane Environment Roberto A. Gaxiola, Kamesh Regmi, Julio Paez-Valencia, Gaston Pizzio, Shangji Zhang Molecular Plant Volume 9, Issue 3, Pages (March 2016) DOI: /j.molp Copyright © 2016 The Author Terms and Conditions
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Figure 1 Hypothetical Models for Tissue- and Membrane-Specific Type I H+-PPase Function. (A) In active sinks such as meristems, tonoplast-bound H+-PPase hydrolyzes cytosolic PPi and energizes expanding vacuoles (Shiratake et al., 1997). (B) PPi scavenging activity of H+-PPase favors sucrose synthesis in cotyledons (Ferjani et al., 2011). (C) PPi synthase activity of plasma membrane-localized H+-PPase favors sucrose hydrolysis through the sucrose synthase pathway in sieve element–companion cell complexes (Pizzio et al., 2015). Molecular Plant 2016 9, DOI: ( /j.molp ) Copyright © 2016 The Author Terms and Conditions
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