title: Phosphatases in lake water: characterization of enzymes from phytoplankton and zooplankton by gel filtration.
abstract: Sephadex gel filtration was used to characterize phosphomonoesterases in two small takes in northern Sweden. Two fractions, here termed phosphatase A and phosphatase B, were found both as free enzymes and associated with seston. The activity of phosphatase A was correlated with the presence of algal biomass. Phosphatase B, on the other hand, was derived from zooplankton. Phosphate served as an effective inhibitor of phosphatase A but had no such effect on phosphatase B. Both fractions had pH optima between 6.5 and 7.0.
mesh_terms: D000460:Chlorophyta / Q000201:enzymology; D003445:Crustacea / Q000201:enzymology; D005068:Eutrophication; D005618:Fresh Water; D010744:Phosphoric Monoester Hydrolases / Q000032:analysis*; D013548:Sweden; D015048:Zooplankton / Q000201:enzymology
chemical_list: D010744:Phosphoric Monoester Hydrolases