Photofading of ballpoint dyes studied on paper by LDI and MALDI MS

Fragmentation pathways of N(G)-methylated and unmodified arginine residues in peptides studied by ESI-MS/MS and MALDI-MS.

Protein methylation at arginine residues is a prevalent posttranslational modification in eukaryotic cells that has been implicated in processes from RNA-binding and transporting to protein sorting and transcription activation. Three main forms of methylarginine have been identified: N(G)-monomethylarginine (MMA), asymmetric N(G),N(G)-dimethylarginine (aDMA), and symmetric N(G),N'(G)-dimethylar...

Dossier MALDI - TOF ■ Oligonucleotide analysis by MALDI - MS

Matrix-assisted laser desorption (MALDI) time-offlight (TOF) mass spectrometry (MS) has been successfully used for oligonucleotide sequence confirmation by mass analysis of fragments generated by concentration-dependent exonuclease digestion. This approach is particularly well-suited to the analysis of synthetic DNA due to the relatively short length of the DNA strands. Additionally, an importa...

Characterizing synthetic polymers by MALDI MS.

Different polymer formulations possess unique chemical, physical, and mechanical properties. Small variations in the structure of a given polymer formulation can significantly change its characteristics, resulting in new functions and applications. For example, polyvinyl alcohol is a water-soluble synthetic polymer made by alcoholysis of polyvinyl acetate. Its chemical and physical properties d...

Identification of Candida species isolated from vulvovaginitis in Mashhad, Iran by Use of MALDI-TOF MS

Background and Purpose Vulvovaginal candidiasis (VVC) is a common problem in women. The purpose of this study was to identify of Candida species isolated from vulvovaginitis woman suffering vulvovaginitis refered to Ghaem Hospital, Mashhad, Iran, by use of MALDI-TOF mass spectrometry.  Materials and Methods The 65 clinical samples isolated from Vulvovaginitis women were collected in...

Characterization of fengycin homologues produced by Bacillus subtilis K1 by MALDI-TOF tandem mass spectrometry (MALDI TOF MS/MS)