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Updated: Jul 9, 2026

Embedded Bioprinting of Tissue-like Structures Using κ-Carrageenan Sub-Microgel Medium
Published on: May 3, 2024
Composition and distribution of carrabiose moieties in hybrid kappa-/iota-carrageenans using carrageenases
Marion Guibet1, Patrick Boulenguer, Jacques Mazoyer
1Université Pierre et Marie Curie, Paris VI-CNRS, Végétaux Marins et Biomolécules, UMR 7139, Station Biologique, F-29680 Roscoff, France.
Abstract:
Hybrid kappa/iota-carrageeans extracted from Gigartina skottsbergii, Chondracanthus chamissoï, and Chondrus crispus were incubated with Pseudoalteromonas carrageenovora kappa-carrageenase and Alteromonas fortis iota-carrageenase. The degradation products as well as the resistant fraction were fully characterized by chromatography, NMR, and mass spectrometry. The low percentage of degradation observed after treatment by the iota-carrageenase suggests that long segments of iota-carrabiose or block of iota-carrageenan are low in abundance. The degradation products of the kappa-carrageenase allow discriminating three modes of kappa-carrabiose distribution: blocks of kappa-carrabiose, kappa-carrabiose rich fraction containing iota-carrabiose units probably randomly distributed, and iota-carrabiose rich fraction which corresponds to the resistant fraction. The proportions of each fraction were related to the botanical origin as well as the place of growth of the seaweed.
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