Porphyran: Difference between revisions
Magioladitis (talk | contribs) m clean up using AWB (8279) |
Ellin Beltz (talk | contribs) m removed category |
||
| Line 10: | Line 10: | ||
[[Category:Polysaccharides]] |
[[Category:Polysaccharides]] |
||
[[Category:Edible algae]] |
|||
Revision as of 07:11, 7 February 2013
Porphyran is a sulfated carbohydrate dervied from red algae of the genus Porphyra.[1]
Composition
Porphyran is a complex sulfated carbohydrate. It is a highly substituted agarose with a linear backbone consisting of 3-linked beta-D-galactosyl units alternating with either 4-linked alpha-L-galactosyl 6-sulfate or 3,6-anhydro-alpha-L-galactosyl units. The composition includes 6-O-sulfated L-galactose, 6-O-methylated D-galactose, L-galactose, 3,6-anhydro-L-galactose, 6-O-methyl D-galactose and ester sulfate. Some of the ester is present as 1-4-linked L-galactose 6-sulfate.[1][2][3][4] The precise composition of porphyran shows seasonal and environmental variations.[1] In Porphyra haitanensis, the L-residues are mainly composed of alpha-L-galactosyl 6-sulfate units, and the 3,6-anhydro-galactosyl units are minor.[3] In Porphyra capensis, the ratio of alpha-L-galactose-6-sulfate and the 3,6-anhydrogalactose is 1.2:1.[4]
References
- ^ a b c Rees DA, Conway E (1962). "The structure and biosynthesis of porphyran: a comparison of some samples". Biochem. J. 84: 411–6. PMC 1243684. PMID 14490986.
{{cite journal}}: Unknown parameter|month=ignored (help) - ^ Peat S, Turvey JR, Rees DA (1961). "Carbohydrates of the red alga, Porphyra umbilicalis". J. Chem. Soc.: 1590–5.
{{cite journal}}: Unknown parameter|month=ignored (help)CS1 maint: multiple names: authors list (link) - ^ a b Zhang Q, Li N, Liu X, Zhao Z, Li Z, Xu Z (2004). "The structure of a sulfated galactan from Porphyra haitanensis and its in vivo antioxidant activity". Carbohydr. Res. 339 (1): 105–11. PMID 14659676.
{{cite journal}}: Unknown parameter|month=ignored (help)CS1 maint: multiple names: authors list (link) - ^ a b Zhang Q, Qi H, Zhao T; et al. (2005). "Chemical characteristics of a polysaccharide from Porphyra capensis (Rhodophyta)". Carbohydr. Res. 340 (15): 2447–50. doi:10.1016/j.carres.2005.08.009. PMID 16150429.
{{cite journal}}: Explicit use of et al. in:|author=(help); Unknown parameter|month=ignored (help)CS1 maint: multiple names: authors list (link)