Table 3.

Summary of extracellular and intracellular purine nucleotides level.

Phenotype	LND	HND	HRH	normal
	Intracellular purines (nmol/mg protein)
AMP	0.39 ± 0.24	0.64 ± 0.92	0.63 ± 0.56	0.56 ± 0.45
GDP	0.61 ± 0.16	0.73 ± 0.36	0.81 ± 0.20	0.75 ± 0.22
ADP	3.34 ± 0.78	3.94 ± 1.87	4.05 ± 1.15	4.14 ± 1.28
GTP	8.09 ± 1.40	8.97 ± 1.53	8.92 ± 1.59	7.85 ± 2.00
ATP	24.38 ± 3.54	26.70 ± 4.17	25.98 ± 3.76	25.71 ± 5.17
	Extracellular purines (μmol/mg protein)
Hypoxanthine	0.51 ± 0.12	0.62 ± 0.26	0.49 ± 0.19	0.23 ± 0.10
Xanthine	0.42 ± 0.10	0.43 ± 0.19	0.44 ± 0.13	0.34 ± 0.09
Uric acid	0.36 ± 0.11	0.39 ± 0.19	0.37 ± 0.11	0.27 ± 0.13
Adenine	0.21 ± 0.05	0.25 ± 0.09	0.21 ± 0.07	0.17 ± 0.04