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Table 1 [Mg2+] and pH values at rest and end-exercise

From: Free Mg2+ concentration in the calf muscle of glycogen phosphorylase and phosphofructokinase deficiency patients assessed in different metabolic conditions by 31P MRS

 

Rest

End-Exercise

 
 

[Mg2+](mM)

pH

%PCr

[Mg2+](mM)

pH

Δ[Mg2+] (mM)

McArdle I

0.34

6.98

53.1%

0.39

7.06*

+ 0.05

McArdle II

0.36

6.95

53.8%

0.32

7.07*

- 0.04*

PFK I

0.38

6.95

54.1%

0.23*

7.01*

- 0.15*

PFK II

0.45*

6.95

35.3%

0.23*

7.01*

- 0.22*

Controls Mean (n = 10)

0.31

6.96

47.7%

0.42

6.8

+0.11

S.D.

0.04

0.02

13.8%

0.06

0.09

0.07

control range [min:max]

[0.27:0.40]

[6.94:7.00]

[22:73]

[0.35:0.54]

[6.90:6.67]

[+0.03:+0.24]

  1. Rest and end-exercise values of cytosolic [Mg2+] and pH assessed by 31P MRS in patients calf muscle, compared to the mean values obtained in a control group of ten healthy subjects with a comparable end-exercise PCr depletion;
  2. Δ[Mg2+]: difference between end-exercise [Mg2+] and rest [Mg2+];
  3. %PCr: percentage of PCr depletion
  4. * denotes values out of the range: control mean ± 2 SD.