For 10 points, name this principal component of bacterial cell walls.
Its synthesis involves the bactoprenol pyrophosphate carrier. Teichoic acids can be connected to it in order to extend its surface, and Braun's lipoprotein is its most abundant protein. Substances that make it up include D-glutamic acid and D-alanine, and it is the one of the few biological molecules to contain D amino acids. It is this substance that causes in the presence of crystal violet that causes bacteria to have a positive result in Gram staining. For 10 points, name this principal component of bacterial cell walls.
Its synthesis involves the bactoprenol pyrophosphate carrier.
{peptidoglycan} [or {murein}]