part_of citric acid cycle pathway Citric acid cycle (TCA cycle) Krebs cycle pathway PW:0000026 TCA cycle pathway The series of chemical reactions that are central to all aerobic cells and constitute the citric acid cycle. Also known as the tricarboxylic acid cycle (TCA) or Krebs cycle, it is the center of convergence for all molecular fuels. pathway tricarboxylic acid cycle tricarboxylic acid cycle pathway energy metabolic pathway energy homeostasis pathway