Carboxykinase is a common term in biochemistry that refers to an enzyme responsible for the conversion of oxaloacetate into phosphoenolpyruvate. It plays a crucial role in gluconeogenesis and helps regulate glucose homeostasis within the body. Though this term may sound complex, there are several synonyms that you might encounter, such as phosphoenolpyruvate carboxykinase (PEPCK), oxaloacetate carboxy-lyase, PEP-carboxylase, and OAA decarboxylase. These terms all refer to the same enzyme and are often used interchangeably in scientific literature. Understanding the various synonyms of carboxykinase can help in the proper interpretation of research, and facilitate communication among scientists in the field.