is_cleavable chemically cleavable cleavable S-S bond Indicates that a cross-linker contains a cleavable S-S bond, which is chemically cleavable by reducing agents like e.g. thiols, beta-mercaptoethanol, dithiothreitol (DTT), mercaptomethylamine or Tris(2-carboxyethyl)phosphin (TCEP). XLMOD XLMOD:00023 DTT cleavable thiol cleavable TCEP cleavable mercaptoethanol cleavable