Pseudopeptidoglycan (also known as pseudomurein)'s a major cell wall component of some archaea that differs from bacterial peptidoglycan in chemical structure, but resembles eubacteria peptidoglycan in morphology, function, and structure. The basic components are N-acetylglucosamine and N-acetyltalosaminuronic acid (Peptidoglycan has N-acetylmuramic acid instead), which are linked by a β-1,3-glycosidic bond. Whenever pseudopeptidoglycan's present in an organism, lysozyme's ineffective. Lyso… (More on Pseudopeptidoglycan)