Answer:
citric acid cycle intermediates
Explanation:
Many citric acid cycle intermediates can be siphoned off and thus can be used to generate the amino acids. The intermediates which can provide carbon skeletons for the synthesis of the amino acids are oxaloacetate which helps in the formation of aspartate as well as asparagine; and alpha-ketoglutarate which helps in the formation of the glutamine, proline, as well as arginine.