Figure 1From: O-GlcNAc profiling: from proteins to proteomesRespective spectra from CID (A), ETD (B), HCD (C), and zoomed in HCD (D) of standard O -GlcNAc modified peptide CKII (PGGSTPV s SANMM, where ‘ s ’ represents the O -GlcNAc modified Ser). Note: “-HexNAc” or “-H2O” indicates the loss of HexNAc or H2O. Low m/z range HCD displays a distinctive pattern of HexNAc fragments (D). (Adapted from[53], with the permission from American Chemical Society)Back to article page