PMID- 18804087 OWN - NLM STAT- MEDLINE DCOM- 20081204 LR - 20081030 IS - 1096-0309 (Electronic) IS - 0003-2697 (Linking) VI - 383 IP - 2 DP - 2008 Dec 15 TI - A gas chromatographic method for quantification of detergents frequently used in membrane protein structural studies. PG - 326-8 LID - 10.1016/j.ab.2008.08.028 [doi] AB - A novel and reliable gas chromatography-flame ionization detection (GC-FID) method that can separate and quantify detergents frequently used in membrane protein structural studies has been developed. Different detergents were identified through FID peaks with different retention times. A quadratic regression curve was found to fit the integrated FID peak area against different detergent concentrations. Detergents can be quantified as low as the nanogram level: lauryl-dimethylamine-N-oxide (LDAO), 5 ng; dodecyl maltoside (DDM), 10 ng; and dodecyl phosphocholine (DPC), 50 ng. This method can be applied directly to measure detergent concentration and molar ratio of membrane protein to detergents during membrane protein extraction, purification, concentration, and crystallization. FAU - Shi, Chaowei AU - Shi C AD - National Laboratory for Physical Science at Microscale, School of Life Science, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China. FAU - Shao, Wei AU - Shao W FAU - Xiong, Ying AU - Xiong Y FAU - Tian, Changlin AU - Tian C LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20080903 PL - United States TA - Anal Biochem JT - Analytical biochemistry JID - 0370535 RN - 0 (Detergents) RN - 0 (Membrane Proteins) SB - IM MH - Chromatography, Gas/*methods MH - Detergents/*analysis/isolation & purification MH - Flame Ionization MH - Membrane Proteins/*chemistry EDAT- 2008/09/23 09:00 MHDA- 2008/12/17 09:00 CRDT- 2008/09/23 09:00 PHST- 2008/06/10 00:00 [received] PHST- 2008/08/25 00:00 [revised] PHST- 2008/08/27 00:00 [accepted] PHST- 2008/09/23 09:00 [pubmed] PHST- 2008/12/17 09:00 [medline] PHST- 2008/09/23 09:00 [entrez] AID - S0003-2697(08)00583-6 [pii] AID - 10.1016/j.ab.2008.08.028 [doi] PST - ppublish SO - Anal Biochem. 2008 Dec 15;383(2):326-8. doi: 10.1016/j.ab.2008.08.028. Epub 2008 Sep 3.