Lysine degradation requires removal of two amino groups. Removal of its e-amino group gives a-aminoadipic semialdehyde. This product is then degraded to acetoacetate by the same chemical strategy used to degrade the branched-chain amino acids. Draw the proposed intermediates in this pathway.

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H 0=0 -5-8-8- CH₂ CH₂ CH₂ HỌ NH T COO™ a-Aminoadipic semialdehyde