An enzyme that catalyzes the addition of a carboxyl group to a specified substrate.
- Chlorophyll contents, as well as concentrations of the carboxylation enzymes Rubisco and phosphoenolpyruvate carboxylase, are lower in aquatic compared with terrestrial leaves of amphibious plants.
- Phosphoenolpyruvate carboxylase catalyses the carboxylation of PEP to form oxaloacetate.
- Within skeletal muscle and heart activation of AMPK leads to the phosphorylation and inhibition of acetyl-CoA carboxylase.
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