Effect of CoM on ethene metabolism in growing cultures of strain JS623. Symbols: ○, ethene in cultures without CoM; □, ethene in cultures with 10 μM CoM; ⋄, epoxyethane in cultures without CoM; ▵, epoxyethane in cultures with 10 μM CoM. The data shown are averages of three replicate cultures, and the error bars show the standard deviations. d, days.