CHAPSO  (Synonyms: 3-[3-(Cholamidopropyl)dimethylammonio]-2-hydroxy-1-propanesulfonate)

CHAPSO is a zwitterionic detergent that is thermally stable. CHAPSO is able to broaden the particle orientation distribution, enabling single-particle cryo-electron microscopy (cryo-EM) to produce isotropically uniform maps. CHAPSO can eliminate the directional bias of bacterial transcription complexes and help determine the structure of bacterial transcription complexes under cryo-electron microscopy^[1][2].

630.88

C₃₂H₅₈N₂O₈S

82473-24-3

Solid

White to yellow

O[C@H]1[C@@]2([H])[C@@]3([H])[C@@]([C@@](CC3)([H])[C@H](C)CCC(NCCC[N+](C)(C)CC(O)CS(=O)([O-])=O)=O)([C@H](C[C@]2([H])[C@@]4([C@](C[C@@H](CC4)O)([H])C1)C)O)C

Room temperature in continental US; may vary elsewhere.

4°C, stored under nitrogen

*In solvent : -80°C, 6 months; -20°C, 1 month (stored under nitrogen)

* Please refer to the solubility information to select the appropriate solvent. Once prepared, please aliquot and store the solution to prevent product inactivation from repeated freeze-thaw cycles.
Storage method and period of stock solution: -80°C, 6 months; -20°C, 1 month (stored under nitrogen). When stored at -80°C, please use it within 6 months. When stored at -20°C, please use it within 1 month.

* Note: If you choose water as the stock solution, please dilute it to the working solution, then filter and sterilize it with a 0.22 μm filter before use.

• [1]. Li M, et al. Morphological characterization of DMPC/CHAPSO bicellar mixtures: a combined SANS and NMR study. Langmuir. 2013 Dec 23;29(51):15943-57.  [Content Brief]

  [2]. Chen J, et al. Eliminating effects of particle adsorption to the air/water interface in single-particle cryo-electron microscopy: Bacterial RNA polymerase and CHAPSO. J Struct Biol X. 2019 Jan-Mar;1:100005.  [Content Brief]