Henry David Thoreau. The mass of men lead lives of quiet desperation. What is called resignation is confirmed desperation. .... A stereotyped but unconscious despair is concealed even under what are called the games and amusements of mankind.--Ch.
Peptidoglycan (pep-tid-o-gly-can) is a molecule found only in the cell walls of bacteria. prokaryotes with protection from the environment. Article Summary: Amount and location of the peptidoglycan molecule in the prokaryotic cell wall determines whether a bacterium is Gram-positive or Gram-negative. You have free access to a large collection of materials used in two college-level introductory microbiology courses (8-week & 16-week).
Cell walls are found in the cells of eubacteria, archaebacteria, fungi, algae, and plants. The cell walls vary greatly in their compositions: Eubacteria. Almost all eubacterial species have cell walls containing a polysaccharide called peptidoglycan.