Electron transfer
Acetylation and succinylation of lysine residues and phosphorylation of serine and threonine residues in ETF-α have been reported in mass spectrometric analyses of posttranslational modifications P13804. Electron transfer flavoprotein regulatory factor 1 (ETFRF1) has been identified as a protein that specifically binds ETF and this interaction has been indicated to inactivate ETF by displacing the FAD.