“…It has been commercially exploited in Brazil (McHugh, 2003), and is considered a potentially profitable species due to its high yields of -carrageenan, fast growth rate and tolerance to different environmental conditions (Vázquez-Delfin, Robledo, & Freile-Pelegrin, 2013). Although several works have previously studied the sulfated galactans from this seaweed, they usually focused on single aspects, such as their structure (Bi, Arman, Hassan, & Iqbal, 2006;Greer, Shomer, Goldstein, & Yaphe, 1984;Hamilton & Carrol, 1962;Knutsen et al, 1995), rheological properties (Andrade, Azero, Luciano, & Gonc ¸ alves, 2000;Bi, Hassan, Arman, Iqbal, & Mahmood, 2007;Mahmood et al, 2007) or biological activities as elicitors of plant defense mechanisms (Arman, 2011;Arman & Ul Qader, 2012;Bi, Arman, Ali, & Iqbal, 2009;Bi & Iqbal, 1999, 2000, 2005Bi, Iqbal, Ali, Aman, & Hassan, 2008;Bi, Iqbal, Arman, Ali, & Hassan, 2011), antioxidant (Alves et al, 2012), antiinflamatory (De Brito et al, 2013Rodrigues, de Araújo, de Paula, Vanderlei, et al, 2011) or cytotoxic (Alves et al, 2012;Rodrigues, de Araújo, de Paula, Lima, et al, 2011). In most of these works, the non-purified extracted polysaccharide (considered to be -carrageenan) was used.…”