Figure 1.
Conversion of [24-14C]-cholic acid by putative bile acid 7α-dehydroxylating strains. First section of autoradiograph of TLC plate includes cholic acid (CA), deoxycholic acid (DCA), and allodeoxycholic acid (ADCA) TLC standards. The second autoradiographic section contains [24-14C]-cholic acid metabolites from several bile acid metabolizing strains, including strain C592. Each isolate was grown anaerobically (N2) in Balch tubes in the presence of 25 µM cholic acid along with 1 µCi [24-14C]-cholic acid. Cultures were extracted with ethyl acetate and separated on TLC as described in the Materials and Methods.