This enzyme is the hydrogen-potassium ATPase pump (H+/K+ ATPase), or, more simply, the proton pump. It normally functions to release H+ ions, forming hydrochloric acid that gets released into your ...
More information: Yuki Hayashi et al, Phosphorylation of plasma membrane H+-ATPase Thr881 participates in light-induced stomatal opening, Nature Communications (2024). DOI: 10.1038/s41467-024-45248-5 ...