TABLE 2.

Effects of nucleotides on Nocardia GTPCH activity

Nucleotide	Remaining activity (%)a
	1 mM	2 mM
None	100	100
UTP	71.7	67.1
TTP	65.6	52.6
CTP	67.7	59.1
ATP	64.3	50.7
GDP	82.7	81.2
GMP	95.4	89.4

^aThe activity of controls (None) containing no nucleotide additive was 0.02 nmol⁻¹·h⁻¹ as 100%.