label: reduced 2[4Fe-4S]-[ferredoxin] + sarcosine + formaldehyde + 2 H(+) => oxidized 2[4Fe-4S]-[ferredoxin] + N,N-dimethylglycine + H2O
label_lc: reduced 2[4fe-4s]-[ferredoxin] + sarcosine + formaldehyde + 2 h(+) => oxidized 2[4fe-4s]-[ferredoxin] + n,n-dimethylglycine + h2o