Table 1.

Purification of angiotensin-converting enzyme2 (ACE2) from immortalized mesangial cells using Abz-SPY(NO2) as substrate.

Step	Volume (mL)	Protein (mg/mL)	Total	Enzymatic activity (nM/min/mL)	Specific activity (nM/mg)	Purification (X)	Recovery (%)
Cell lysate	0.1	5.84	0.584	43.3	7.41	1	100
Resource Q	2.5	0.03	0.075	1.21	40.33	5.44	12.84