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    Keywords: PEPTIDE ; Germany ; SITE ; SITES ; RESOLUTION ; MARKER ; IDENTIFICATION ; COLLISION-INDUCED DISSOCIATION ; ELECTROSPRAY ; mass spectrometry ; tandem mass spectrometry ; MASS-SPECTROMETRY ; TIME-OF-FLIGHT ; PEPTIDES ; MASSES ; RE ; HIGH-RESOLUTION ; BOVINE ; diiodo-tyrosine ; immonium ion ; mass-deficiency ; monoiodo-tyrosine ; thyroglobulin ; tyrosine iodination
    Abstract: Peptides containing a monoiodo- or diiodo-tyrosine residue (monoiodo-Y, diiodo-Y) were found Received: March 31, 2004 to generate abundant immonium ions following collision-induced dissociation at m/z 261.97 Accepted: June 30, 2004 and 387.87 Da, respectively. These residue-specific marker ions are between about 140 mDa (monoiodo-Y) and 300 mDa (diiodo-Y) mass deficient relative to any other peptide fragment ions of unmodified peptides, qualifying them as highly specific marker ions for tyrosine iodination when analyzed by high resolution tandem mass spectrometry (MS/MS). Two new iodination sites (Y-364 and Y-2165) were pinpointed in bovine thyroglobulin by MS/MS using these iodotyrosine-specific marker ions and combined tryptic/chymotryptic digestion
    Type of Publication: Journal article published
    PubMed ID: 15627961
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