List of hetero-cross-linked peptides determined by chemical derivatization and mass spectrometry.

Only peptides with an xQuest score of higher than 15 are displayed as those cross-linking results are likely to be reliable [25] (Text S1). The respective modified amino acid is displayed in bold. Under “Crosslink” listed positions are the absolute positions of the respective protein (including signal peptides), “Error” the deviation of measured precursor ion mass from theoretical precursor ion mass in parts per million, and “Score” the xQuest score.