Although showing poorly resolved spectra, it was possible to infer resonances associated to the presence of [alpha]- [sup.1]H- and [beta]-[sup.1]H-anomeric signals attributed to protons of (1,4)-linked
galactopyranose and anhydrogalactose at down-field region and of (1,3)-linked
galactopyranoses at up-field region (Maciel et al., 2008; Fenoradosoa et al., 2009), respectively.
Agarose is an alternating copolymer of 3-linked--D
galactopyranose and 4-linked 3,6-anhydro-agalactopyranose units.
Both [alpha]- and [beta]-[sup.1]H-anomeric signals of the spectrum resonating from [[delta].sub.H] ~4.6 to 5.6 ppm were ascribed to be down- and high-field regions belonging to the 4-linked units and 3-linked
galactopyranoses and anhydrogalactopyranose units, respectively (Cardozo et al., 2007; Prajapati et al., 2014; Smit, 2004).