Essay on bacterial cell wall composition

Bacterial kiosk W both Composition Almost all bacteria set about cubicleular teleph unityular phone walls environ the carrel membranes. This stall wall helps to do classic functions, the like confer cell shape, and protect the cell from lysis when in conf employ solute environments. There atomic number 18 three classifications used in describing cell walls: thousand Positive (Gram+), Gram oppose (Gram-) and Acid-Fast. These membranes dole out a common part in their structure, however--an interlocked shape of peptidoglycan. Peptidoglycan is a molecular complex made from both sugar monomers: N-acetylmuramic deadly (NAM) and N-acetylglucosamine (NAG). NAM and NAG be strung in concert to flesh a chain. Several of these chains are create side-by-side and then are bonded, or cross-linked, forming a layer. Each of these layers is, in turn, cross-linked to each some other in the same modal value that the chains were linked into layers. In other words, the NA M and NAG are bound together into duds. These threads are then add together to form a mat. The mats are laid on top of another and tied together to form the peptidoglycan of the cell wall. The number of layers in the peptidoglycan differs powerfully between Gram+ and Gram- (and Acid-Fast) cell walls. Think Positive: The Gram-Positive Cell Wall Gram+ cell walls sire a distinctly thick layer of peptidoglycan (which contrasts with the thin layer in Gram- and Acid-Fast--more on that later).

Teichoic and Lipoteichoic acids run throughout the layers of the peptidoglycan. Teichoic acid is a polymer made from R ibitol-phosphate and/or glycerol-phosphate. ! Lipoteichoic acid is a teichoic acid attached to a lipid, which is seated in the cell membrane. Teichoic acid is often used by the immune form as an antigen. Some Gram+ cell walls also have teichuronic acid, which is made from two or more repeating subunits, one of which is a derivative of uronic acid. Various proteins are also embedded... If you verificatory request to get a full essay, order it on our website: BestEssayCheap.com

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