Xylan

Structure of xylan in hardwood.[1]
Plant cell wall is composed of cellulose, hemicellulose, pectin and glycoproteins.[2] Hemicelluloses (a heterogeneous group of polysaccharides) cross-link glycans interlocking the cellulose fibers and form a mesh like structure to deposit other polysaccharides.

Xylan (/ˈzlæn/;[3] /ˈzlən/[4]) (CAS number: 9014-63-5) is a type of hemicellulose, a polysaccharide consisting mainly of xylose residues. It is found in plants, in the secondary cell walls of dicots and all cell walls of grasses.[5] Xylan is the third most abundant polysaccharide on Earth, after cellulose and chitin.[citation needed]

  1. ^ Horst H. Nimz, Uwe Schmitt, Eckart Schwab, Otto Wittmann, Franz Wolf "Wood" in Ullmann's Encyclopedia of Industrial Chemistry 2005, Wiley-VCH, Weinheim. doi:10.1002/14356007.a28_305
  2. ^ Carpita, Nicholas C. (2011-01-01). "Update on Mechanisms of Plant Cell Wall Biosynthesis: How Plants Make Cellulose and Other (1→4)-β-d-Glycans". Plant Physiology. 155 (1): 171–184. doi:10.1104/pp.110.163360. ISSN 0032-0889. PMC 3075763. PMID 21051553.
  3. ^ Collins English Dictionary
  4. ^ Houghton Mifflin Harcourt, The American Heritage Dictionary of the English Language, Houghton Mifflin Harcourt.
  5. ^ Mellerowicz, E. J.; Gorshkova, T. A. (2011-11-16). "Tensional stress generation in gelatinous fibres: a review and possible mechanism based on cell-wall structure and composition". Journal of Experimental Botany. 63 (2): 551–565. doi:10.1093/jxb/err339. ISSN 0022-0957. PMID 22090441.