Fig. 6From: Effect of sodium and calcium on polysaccharide production and the activities of enzymes involved in the polysaccharide synthesis of Lentinus edodesEnzyme activities of PGI (a, b), PGM (c, d) and UGP (e, f) under different culture periods and metal ions Na+ and Ca2+, respectively. 15 days, 30 days, 45 days and 60 days represent the incubation time after the addition of metal ionsBack to article page