ω-Muricholic acid-d4 (ω-MCA-d4) is intended for use as an internal standard for the quantification of ω-MCA by GC- or LC-MS. ω-MCA is a murine-specific secondary bile acid.1,2 It is formed via enzymatic conversion of β-MCA by a variety of intestinal microorganisms, including Clostridium, in rat and mouse gut.
1.Eyssen, H., De Pauw, G., Stragier, J., et al.Cooperative formation of ω-muricholic acid by intestinal microorganismsAppl. Environ. Microbiol.45(1)141-147(1983) 2.Sacquet, E.C., Raibaud, P.M., Mejean, C., et al.Bacterial formation of ω-muricholic acid in ratsAppl. Environ. Microbiol.37(6)1127-1131(1979)
















