Keratan sulphate types

Ouantock AJ, Fullwood NJ, Thonar EJ, Waltman SR, Capel MS, Ito M, Verity SM, Schanzlin DJ. Macular corneal dystrophy type II multiple studies on a cornea with low levels of sulphated keratan sulphate. Eye 1997 11 57-67. 

Nieduszynski lA, Huckerby TN, Dickenson JM, Brown GM, Tai GH, Morris HG, Eady S. There are two major types of skeletal keratan sulphates. Biochem J 1990 271 243-245. 

Olsson L, Stigson M, Perris R, Sorrell JM, Lofberg J. Distribution of keratan sulphate and chondroitin sulphate in wild type and white mutant axolotl embryos during neural crest cell migration. Pigment Cell Res 1996 9 5-17. 

For some polysaccharides, such as keratan sulphate, the linkage sequences seem to have the same sfructixres as the oligosaccharides of conventional glycoproteins and the pathways of their synthesis are presumably the same. Hence mucin-type or complex-type chains can act as link sequences and so dolichol can be involved in some forms of link production. Some other polysaccharides, such as heparin, are attached to sequences that have no known counterpart in typical glycoprotein assembly. 

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