Figure 4: Methionine as a precursor of CH4.

δ13C signature of headspace-CH4 when P. sapidus was grown on 13C-methionine (n=2). Error bars represent s.d. of the mean. The control jars contained sterile medium only.
δ13C signature of headspace-CH4 when P. sapidus was grown on 13C-methionine (n=2). Error bars represent s.d. of the mean. The control jars contained sterile medium only.