Table 3.

Enrichments observed in monensin A after incorporation ofn-[1-13C]butyrate and [1-13C]isobutyrate in the wt and inmutB::hygB andicmA::hygB mutants of S. cinnamonensis

Monensin carbonn-[1-13C]butyrate[1-13C]isobutyrate
wtmutB::hygicmA::hygwtmutB::hygicmA::hyg
Acetate unit
 C-71.41.51.31.71.6 NDa
 C-91.51.61.62.11.8
 C-131.51.31.42.81.7
 C-191.81.81.53.42.2
 C-251.61.61.32.11.8
Propionate unit
 C-15.08.83.16.99.2ND
 C-35.18.83.07.79.3
 C-55.29.23.17.29.3
 C-114.68.83.18.28.6
 C-174.78.73.16.89.3
 C-215.39.53.27.19.4
 C-234.98.93.17.19.0
Butyrate unit
 C-1516.812.38.917.012.4ND
  • a ND, not determined (see text).