Best Bet Detergents for SAXS

Below CMC Above CMC
Group 1
(n=20)
Good for SAXS Possible with strong protein signal
Group 2
(n=22)
Good for SAXS Bad for SAXS
Group 3
(n=31)
Possible with strong protein signal Bad for SAXS

Here are the recommended concentrations of detergents that may contribute the least amount of background to SAXS studies. Omitted from this list are any detergents that would need to be used at concentrations < 0.1%, based on the above table and the detergent CMCs.

Common Detergents
0.1% CHAPS
0.2% DDMAB
0.5% OG

Group I less than 2xCMC
0.1% 1-s-Nonyl-β-D-thioglucoside
0.2% n-Decanoylsucrose
0.3% n-Nonyl-β-D-maltoside
0.4% DDAO
0.5% C8E5
0.8% FOS-Choline®-10
1.1% FOS-Choline®-9

Group II less than 1xCMC (rounded down)
0.1% Cymal®-5
0.1% Zwittergent®3-12
0.1% Nonyl-β-D-glucoside
0.2% HEGA-10
0.2% 1-s-Octyl-β-D-thioglucoside
0.2% n-Nonyl-β-D-maltoside (2)
0.4% C-HEGA-11
0.6% HECAMEG
0.8% Heptyl-β-D-thioglucoside
0.8% MEGA-9
0.8% 1-s-Heptyl-β-D-thioglucoside
1.2% Zwittergent® 3-10
5.2% C-HEGA-8
9.2% Zwittergent® 3-08
14.8% Cymal®-1

Group III less than 0.2xCMC
0.1% CHAPSO
0.2% n-Octanoylsucrose
0.3% C-HEGA-10
0.3% HEGA-9
0.3% Cymal®-3
0.5% MEGA-8
0.6% C-HEGA-9
1.0% Cymal®-2
1.2% n-Hexyl-β-D-glucoside