Table 1.

Purification of rVAMT.

Step	Total activity (U)	Total protein (mg)	Specific activity (U/mg)*	Yield (%)	Purification (-fold)
Crude	78.1	1020	0.0765	100	1
TALON	37.9	33.2	1.14	48.5	14.9
thrombin	47.1	33.2	1.42	60.3	18.5
Butyl-Toyopearl	7.59	1.73	4.38	9.71	57.3

^*V-forming activity from VA using pyruvate as an amino acceptor.