Table 1 Normalized charges (Qnorm) following 100 μM ATP concentration jumps in the presence of 10 μM free Ca2+ and different potassium salts (100 mM), lyotropic number (N), air/water surface tension molar increment (σ, in μN·m2·mol−1), lysozyme/water surface tension molar increment (σLW, in μN·m2·mol−1) and entropy of hydration (ΔShydr, in J·mol−1·K−1) for the single anion.

From: Hofmeister effect of anions on calcium translocation by sarcoplasmic reticulum Ca2+-ATPase

Anion (X)

Qnorm

Na

σb

σLWc

ΔShydrb

Cl

1

10.0

1.63

1.6

−75

SO42−

2.35 ± 0.01

2.0

2.66

 

−200

Br

0.44 ± 0.02

11.3

1.31

−1.4

−59

NO3

0.47 ± 0.04

11.6

1.18

0.1

−76

SCN

0.32 ± 0.02

13.2

1.06

−5.0

−66

I

0.20 ± 0.07

12.5

1.02

−4.2

−36

  1. Charges are normalized with respect to the value obtained in the presence of 100 mM KCl (control measurement). Data represent the mean ± s.e.m. of three independent measurements.
  2. afrom ref. 43.
  3. bfrom ref. 45.
  4. cfrom ref. 44.