Table 1. Myoplasmic concentrations of Ca... | Rockefeller University Press

Table 1.

Myoplasmic concentrations of Ca²⁺, Mg, and Ca²⁺ binding compounds and concentrations expressed relative to cell water volume

Compound	Concentration	Reference
Total Ca²⁺	4,000 µM	Lamboley et al., 2015
Resting [Ca²⁺]	0.05 µM (SR Ca²⁺ leak, 0.005 µM/s)	Bakker et al., 1993
Resting [Mg²⁺]	1 mM	Barclay, 2015
ATP	8,000 µM	Barclay, 2015
Tn	120 µM; two distinct Ca²⁺-binding sites/molecule	Baylor and Hollingworth, 2003
Pv	750 µM; two equivalent Ca²⁺-binding sites/molecule	Raymackers et al., 2000
M	120 µM; assumed equal to [Tn]
A	Available actin binding sites, concentration time-dependent and equal to [Tn-Ca₂]

Compound	Concentration	Reference
Total Ca²⁺	4,000 µM	Lamboley et al., 2015
Resting [Ca²⁺]	0.05 µM (SR Ca²⁺ leak, 0.005 µM/s)	Bakker et al., 1993
Resting [Mg²⁺]	1 mM	Barclay, 2015
ATP	8,000 µM	Barclay, 2015
Tn	120 µM; two distinct Ca²⁺-binding sites/molecule	Baylor and Hollingworth, 2003
Pv	750 µM; two equivalent Ca²⁺-binding sites/molecule	Raymackers et al., 2000
M	120 µM; assumed equal to [Tn]
A	Available actin binding sites, concentration time-dependent and equal to [Tn-Ca₂]

Where necessary, reported values expressed relative to muscle wet weight were converted by multiplying by 1.5 (Baylor et al., 1983).

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