How is the peptidoglycan of the cell wall synthesized?

1. the precursors are synthesised and activated in the cell 2. the acetylglucosamine and acetylmuramic acid are attached to bactoprenol 3. bactoprenol is transferred to the other side of the cell wall 4. peptidoglycan is extended; transpeptidases cross-link the peptidoglycan and D-carboxypeptidases remove unreacted D-alanines