Journal
CARBOHYDRATE POLYMERS
Volume 157, Issue -, Pages 31-37Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2016.09.050
Keywords
Chondroitin sulfate; Elasmobranch; Scyliorhinus canicula; Prionace glauca; Raja clavata; Sulfation position
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Funding
- POCTEP Programme, EU [0687_NOVOMAR_1_P]
- LIFE+ Programme, EU [iSEAS LIFE13 ENV/ES/000131]
- FCT/MEC [FCT UID/CTM/50011/2013, POCI-01-0145-FEDER-007679]
- QOPNA research Unit [FCT UID/QUI/00062/2013]
- FEDER
- FCT foundation [IF/00373/201, SFRH/BPD/100627/2014]
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Chondroitin sulfate (CS) was isolated from Scyliorhinus canicula (fin, head and skeleton), Prionace glauca (head), and Raja clavata (skeleton) by-products from fish processing industry using environmentally friendly processes. The molecular weight was determined by gel permeation chromatography and the sugar composition and sulfation position by NMR and SAX-HPLC after enzymatic digestion. The CSs showed a prevalent 6S GaINAc sulfation for the 3 species (4S/6S ratio lower than 1). A higher 6S sulfation was observed for P. glauca head and R. clavata skeleton (4S/6S ratio below 0.20) than for S. canicula (4S/6S ratio ca. 0.6). The existence of CS samples with such low 4S/6S ratio has only been observed before in a rare species of shark (Mitsukutina owatoni, globin shark). The good extraction yields achieved make S. canicula, P. glauca and R. clavata fish industry by-products a useful source of 6-sulfated chondroitin sulfate. (C) 2016 Elsevier Ltd. All rights reserved.
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