Abstract
Carrageenans water- and alkali-extracted from Chondracanthus chamissoi, Mazzaella laminarioides, Sarcothalia crispata, and Sarcothalia radula were degraded by Pseudoalteromonas carrageenovora κ-carrageenase and Alteromonas fortis ι-carrageenase. The composition of the high molecular weight fraction (i.e., enzyme-resistant fraction) as well as the standard and hybrid oligosaccharide content highlighted differences between the species-specific carrageenans in terms of composition and distribution of the carrabiose moieties. Inspection of the distribution of μ- and ν-carrabiose, the biosynthetic precursors of κ- and ι-carrabiose, revealed their localization in κ-carrabiose- or ι-carrabiose-rich segments, respectively.
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