Gelling carrageenan from cystocarpic plants of A. flabelliformis is iota/kappa-type.
The polysaccharide contains minor amounts of beta-, nu- and mu-carrageenans.
Xylose substitutes OH-group at C-6 of 1,3-linked β-d-galactose in agaran structures.
Carrageenans increase cytokines synthesis depending on their molecular weight.