- Hatch-Slack-Kortshak pathway
(= Hatch-Slack pathway)Metabolic pathway responsible for primary CO2 fixation in C4 plant photosynthesis. The enzymes that are found in mesophyll chloroplasts include PEP carboxylase, that adds CO2to phosphoenolpyruvate to give the 4-carbon compound, oxaloacetate. Four-carbon compounds are transferred to bundle-sheath chloroplasts, where the CO2 is liberated and re-fixed by the Calvin-Benson cycle. The HSK pathway permits efficient photosynthesis under conditions of high light intensity and low CO2 concentration, avoiding the non-productive effects of photorespiration.
Dictionary of molecular biology. 2004.