. Author manuscript; available in PMC: 2011 Dec 1.

Published in final edited form as: Biochemistry. 2006 Oct 3;45(39):12144–12155. doi: 10.1021/bi061005x

Table 1.

Specific Activity and Zinc Metal Ion Content of GCH II Proteins

protein	specific activity^a [µmol min⁻¹ (mg of protein)⁻¹]	turnover no. (min⁻¹)	Zn/monomer
SCO 1441	0.038 ± 0.003	1.8 ± 0.1	0.9
SCO 2687	0.13 ± 0.03	3.1 ± 0.6	1.0
SCO 6655	0.18 ± 0.03	4.3 ± 0.6	1.1
Met120Tyr SCO 6655	0.05 ± 0.01	1.2 ± 0.3	0.85
E. coli GCH II	0.08 ± 0.01	1.7 ± 0.2	ND^b

Values are from an average of three determinations.

ND, not determined.