Much like ECD, ETD is effective for peptides with modifications such as phosphorylation. The products are listed under ETD Itemisers. Unique bond cleavages resulting from ETD supply valuable diagnostic information. Artists who have performed at ETD Pop in previous years are listed below. Railroads proposed the end-of-train device (EOT or ETD) as an alternative. Transfers to other ETD routes or to connecting bus services are free. Primarily used in desktop ETD systems, mass spectrometry can be miniaturized for handheld ETD. Recently, mass spectrometry (MS) has emerged as another ETD technology. Adding an electron through an ion-ion reaction is called electron transfer dissociation (ETD). Explosives trace detectors (ETD) are explosive detection equipment able to detect explosives of small magnitude. Also, in Canada, flight plans are opened automatically at the estimated time of departure (ETD). ETD is widely used in the analysis of protein and large peptides.