26-Diaminoheptanedioic acid

Diaminopimelic acid or DAPA is a lysine-like amino acid derivative that is a key component of the bacterial cell wall. DAPA is incorporated or integrated into peptidoglycan of gram negative bacteria and is the attachment point for Braun's lipoprotein (BLP or Murein Lipoprotein) . BLP is found in gram-negative cell walls and is one of the most abundant membrane proteins.