Agar is the major cell wall component of red algae such as genera of Gracilariopsis and Gelidium, which provide the abundant raw materials for the development of agar products (Abraham et al., 2018).It has been widely used in biotechnology, food and pharmaceutical industries. Agar consists of agarose and agaropectin, and agarose accounts for more than 70% (Torres et al., 2019). Agarose is a polysaccharide composed of agarobiose, a disaccharide made from D-galactose and 3,6-anhydro-L-galactopyranose (3,6-AG). On the other hand, the minority agaropectin is slightly different from agarose, with modifications on the hydroxyl groups of 3,6-AG, mostly by side groups such as sulfoxy, methoxy, and pyruvate residues (Fu & Kim, 2010). Meaningfully, the presence of sulfate groups in agaropectin compromises the agar quality as they affect the gel strength by interfering with the crosslinking during the gelation process (Zhang et al., 2019). Arylsulfatase (arylsulfate sulfohydrolase; EC3.1.6.1), existing in diverse organisms ranging from bacteria to mammals, is a type of sulfatase enzyme that can function to cleave the arylsulfate ester bond
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