part_of part of peptidoglycan-based cell wall Gram-positive-bacterium-type cell wall 20-80nm peptidoglycan-based cell wall A layer of peptidoglycan found outside of the cytoplasmic membrane. The peptidoglycan is relatively thick (20-80nm) and retains the primary stain of the Gram procedure, thus cells appear blue after Gram stain. The cell walls often contain teichoic acids (acidic anionic polysaccharides) bound to the peptidoglycan. Examples of this component are found in Gram-positive bacteria. GO:0009275 cell wall of Gram-positive Bacteria cellular_component