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- W2000821594 abstract "Oligonucleotides containing a photocleavable biotin (5′-PC-biotin) were analyzed by matrix assisted laser desorption/ionization mass spectrometry (MALDI-MS) with wavelengths in the ultraviolet (UV) and infrared (IR) from solution and after capture on streptavidin-coated agarose or magnetic beads. The analysis was used to monitor the release of the oligonucleotides as a result of photochemical cleavage of the biotinylated linker. Near-UV pulses (UV-MALDI) led to predominant release of the photocleaved product. In contrast, only the uncleaved analyte was detected using IR pulses (IR-MALDI). Results from MALDI analysis are also presented for DNA containing a photocleavable 5′-amino group which can be covalently linked to a variety of activated surfaces and marker molecules. In a demonstration of this approach, a 5′-PC-biotinylated 49 nt RNA oligonucleotide was enzymatically synthesized using a PC-biotin-r(AG) dinucleotide primer, captured on streptavidin coated magnetic beads and analyzed by UV-MALDI. Potential applications of photocleavable linkers combined with MALDI for the analysis of nucleic acids are discussed." @default.
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- W2000821594 date "1999-12-01" @default.
- W2000821594 modified "2023-10-18" @default.
- W2000821594 title "Matrix-assisted laser desorption/ionization mass spectrometry of DNA using photocleavable biotin" @default.
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- W2000821594 doi "https://doi.org/10.1016/s1050-3862(99)00049-2" @default.
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