Search results
Results from the WOW.Com Content Network
Peptidoglycan or murein is a unique large macromolecule, a polysaccharide, consisting of sugars and amino acids that forms a mesh-like layer (sacculus) that surrounds the bacterial cytoplasmic membrane. [1] The sugar component consists of alternating residues of β-(1,4) linked N-acetylglucosamine (NAG) and N-acetylmuramic acid (NAM).
Pseudopeptidoglycan is composed of two sugars, N-acetylglucosamine and N-acetyltalosaminuronic acid.These sugars are made of different amino acids, and the peptide cross-links within pseudopeptidoglycan are formed with different amino acids.
This layered structure is called peptidoglycan (formerly called murein). GlcNAc is the monomeric unit of the polymer chitin, which forms the exoskeletons of arthropods like insects and crustaceans. It is the main component of the radulas of mollusks, the beaks of cephalopods, and a major component of the cell walls of most fungi.
N-Acetylmuramic acid (MurNAc) is part of the peptidoglycan polymer of bacterial cell walls.MurNAc is covalently linked to N-acetylglucosamine and may also be linked through the hydroxyl on carbon number 4 to the carbon of L-alanine.
Braun's lipoprotein (BLP, Lpp, murein lipoprotein, or major outer membrane lipoprotein) was first identified by V. Braun and K. Rehn in 1969, it was the first Lipoprotein identified prompting much further study in this area. [1]
Double-stranded DNA phage lysins tend to lie within the 25 to 40 kDa range in terms of size. A notable exception is the streptococcal PlyC endolysin, which is 114 kDa. PlyC is not only the biggest and most potent lysin, but also structurally unique since it is composed of two different gene products, PlyCA and PlyCB, with a ratio of eight PlyCB subunits for each PlyCA in its active conformation.
The word "murrain" / ˈ m ʌr ɪ n / [1] (like an archaic use of the word "distemper") is an antiquated term covering various infectious diseases affecting cattle and sheep. [2]The word originates from Middle English moreine or moryne, in parallel to Late Latin morina ("plague"), a probable derivative of Latin mori ("to die").
The discovery of the Casparian strip dates back to the mid-19th century, and advances in the understanding of the endodermis of plant roots. [15] In 1865, the German botanist Robert Caspary first described the endodermis of the root of plants, found that its cell wall was thickened, and named it Schuchtzscheide.