Extracellular ATP Is Required for the Viability of Maize Cell Cultures.
Viability of maize cell suspension cultures after treatment with water (control), 1 mM ATP, 1 mM AMP-PCP, 100 units/mL apyrase, or 50 mM glucose + 200 units/mL hexokinase (Glc-Hk). Data and error bars represent means ± sd (n = 3).