Search results for "Disulphide bridges"

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Detection and localisation of disulphide bonds in a synthetic peptide reproducing the sequence 1-30 of Par j 1.0101 by electrospray ionisation mass s…

2001

The structural characterisation of a synthetic peptide reproducing the sequence 1–30 of Par j 1.0101, a major allergenic protein present in the pollen of Parietaria judaica, by combined use of chemical and enzymatic cleavage, reversed-phase high-performance liquid chromatography (RP-HPLC) and electrospray ionisation mass spectrometry (ESI-MS), is described. Direct ESI-MS of the synthetic peptide after reaction with methyl iodide showed that the product is a mixture of two peptides: one form in which two out of the four cysteine residues present in the sequence are oxidised and a minor amount of another form in which all the cysteines are fully reduced. It was ascertained, using the combined…

Spectrometry Mass Electrospray IonizationElectrospray ionisation mass spectrometrySettore CHIM/10 - Chimica Degli AlimentiMolecular Sequence Data010401 analytical chemistryReproducibility of ResultsDisulphide bridgesGeneral Medicine010402 general chemistryPeptide Mapping01 natural sciencesAtomic and Molecular Physics and OpticsParietaria judaica0104 chemical sciencessynthetic peptide; Par j 1.0101; Parietaria judaica; disulphide bridges; structural characterisation; electrospray ionisation mass spectrometrySynthetic peptideTrypsinAmino Acid SequenceCyanogen BromideDisulfidesStructural characterisationPeptidesPar j 1.0101Chromatography High Pressure LiquidSpectroscopy
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