“…b-Carrageenan (G-DA) ( Figure 2C) is produced in important quantities by Furcellaria lumbricalis (Furcellariaceae), Tichocarpus crinitus (Tichocarpaceae), and Betaphycus gelatinus (as Eucheuma gelatinum) (Solieriaceae), mostly as b/k-hybrid carrageenan Santos, 1989;Knutsen et al, 1990;Barabanova et al, 2010;Correc et al, 2012), and it was possible to isolate it in a pure form from Betaphycus gelatinus, B. speciosus (as Eucheuma gelatinum, E. speciosa, Solieriaceae), and Endocladia muricata (Endocladiaceae) with low yield (Renn et al, 1993). Highly pyruvylated carrageenans of the b-family were isolated from six species of the genus Callophycus (Placentophoraceae); these galactans consisted predominantly of the repeating disaccharide 4',6'-O-(1-carboxyethylidene) carrabiose 2-sulfate (GP-DA2S) and minor amounts of the acarrageenan repeating unit (G-DA2S) ( Figure 2C) (Chiovitti et al, 1997;Falshaw et al, 2003).…”