COMBINED FRACTIONATION FOR CHONDROITIN SULFATE -SELECTIVE CHARACTERIZATION FROM Oreochromis niloticus GILLS
DOI:
https://doi.org/10.18817/repesca.v16i3.4073Resumo
Fish waste glycosaminoglycans (GAGs) processing has been challenger in structural biology. This study papain-extracted chondroitin sulfate-CS was separately fractionated with cethylpiridium chloride-CPC, alcohol-AL or acetone-AC for its selective characterization from the cultured Nile tilapia gills. Enzimatic-extraction resulted in five CS containing-(2, 4, 6, 8 or 10%) CPC fractions (p > 0.05), of which in 10% CPC one checked for strongest metachromasia by cationic dye, accounting for 0.89 ± 0.16% total yield (w w-1) from the tritured gills arches. Regarding tritured whole gills, crude CS (0.91 ± 0.03% yield, w w-1) precipitated with AL or AC yielded 0.10 ± 0.47 and 0.16 ± 0.00% for fractions FAL1 and FAC1 (w w-1, p < 0.05), respectively, but they had no metachromasia. By contrast, FAL1 and FAC1 showed different structurally materials, without sulfation and presence of C-6-S vs. crude CS (C-4/6-S), by agarose gel electrophoresis using known GAGs and infrared technique, respectively. Therefore, gills of cultured Nile tilapia have CS and applied technique with organic solvents fractionated it into different molecules for the partial knowledge of its structural biology.