Smolka, G E Rare earth metal ions as substitutes for the calcium ion in Bacillus subtilis -amylase. [electronic resource] - Biochemistry Nov 1971 - 4556-61 p. digital Publication Type: Journal Article ISSN: 0006-2960 Standard No.: 10.1021/bi00800a033 doi Subjects--Topical Terms: Amylases--analysisBacillus subtilis--enzymologyCalciumCircular DichroismDialysisDysprosiumEdetic AcidEnzyme ActivationErbiumFerricyanidesLanthanumLutetiumNeodymiumPraseodymiumProtease InhibitorsSamariumSpectrophotometrySpectrum AnalysisSulfonic AcidsTerbiumUltraviolet RaysYtterbiumYttrium