Table 1. Purification of maltase from endosperm extracts.

	Protein	Specific activity	Total activity	Recovery	Fold purification
	(mg)	(nmol μg-1 min-1)	(μmol min-1)	(%)
Crude	45	0.1	3.6	100	1
20–80% ammonium sulfate	30	0.1	4	111	1.7
MonoQ (unbound)	6	0.4	2	56	4.5
MonoS, peak Id	0.025	13.5	0.34	9.5	168

Recovery is the percentage of the initial (crude extract) activity remaining at each step of the purification. Fold purification is the fold increase in specific activity relative to the crude extract at each stage of the purification.