ID 1.5.8.3 DE sarcosine dehydrogenase. CA (6S)-5,6,7,8-tetrahydrofolyl-(gamma-L-Glu)(n) + H(+) + oxidized CA [electron-transfer flavoprotein] + sarcosine = (6R)-5,10- CA methylenetetrahydrofolyl-(gamma-L-Glu)(n) + glycine + reduced [electron- CA transfer flavoprotein]. CC -!- A flavoprotein (FMN) found in eukaryotes. CC -!- In the absence of tetrahydrofolate the enzyme produces formaldehyde. CC cf. EC 1.5.3.1 and EC 1.5.3.24. CC -!- Formerly EC 1.5.99.1. DR Q9UL12, SARDH_HUMAN; Q99LB7, SARDH_MOUSE; Q64380, SARDH_RAT ; //