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. 2006 Sep 27;399(Pt 2):351–359. doi: 10.1042/BJ20060715

Table 1. Concentrations of substrates required for activation of ATPase activity of TM7 cysteine mutants by 50% (S50).

ND, not determined because of very low expression.

Mutant Verapamil S50 (μM) Vinblastine S50 (μM) Colchicine S50 (μM)
F711C 9.8±1.1 2.3±0.2 410±20
V712C 10.0±0.8 1.9±0.2 320±40
V713C 9.9±1.3 1.8±0.2 340±40
G714C 14.1±2.1 1.9±0.3 410±30
V715C 9.8±1.3 1.8±0.3 330±40
F716C 10.1±1.0 2.1±0.1 340±30
C717C 10.0±1.5 2.3±0.3 390±20
A718C 10.5±1.3 2.0±0.1 330±30
I719C 10.5±1.5 1.9±0.2 370±30
I720C 12.4±0.7 2.4±0.2 390±10
N721C 13.0±1.2 1.7±0.2 380±40
G722C ND ND ND
G723C 11.1±0.4 2.0±0.3 410±20
L724C 12.0±1.5 2.4±0.3 340±30
Q725C 11.7±1.1 2.0±0.1 390±20
P726C 11.9±1.0 1.9±0.2 450±30
A727C 21.2±3.1 1.9±0.2 480±40
F728C 48.7±2.2 2.7±0.3 830±90
A729C 34.3±3.0 2.3±0.2 760±80
I730C 12.0±1.1 2.0±0.1 420±30
I731C 13.5±1.9 1.9±0.2 410±30
Cys-less 11.6±1.3 2.1±0.3 400±40