Figure 1From: Identification of ubiquitin/ubiquitin-like protein modification from tandem mass spectra with various PTMsVarious mass shifts that could be generated from a Ubl. (a) An example of theoretical fragmentation patterns and cleavage sites from UFM1_HUMAN. (b) A theoretical spectrum of b-ions from Ubl-modified target peptide, without y-ions from Ubl-modified target peptide and b-ions from Ubl.Back to article page