label: (6S)-5,6,7,8-tetrahydrofolyl-(gamma-L-Glu)(n) + sarcosine + oxidized [electron-transfer flavoprotein] + H(+) <=> (6R)-5,10-methylenetetrahydrofolyl-(gamma-L-Glu)(n) + reduced [electron-transfer flavoprotein] + glycine
label_lc: (6s)-5,6,7,8-tetrahydrofolyl-(gamma-l-glu)(n) + sarcosine + oxidized [electron-transfer flavoprotein] + h(+) <=> (6r)-5,10-methylenetetrahydrofolyl-(gamma-l-glu)(n) + reduced [electron-transfer flavoprotein] + glycine