Unit

UNIT 10.12 3,4-Diaminobenzophenone Matrix for Analysis of Oligonucleotides by MALDI-TOF Mass Spectrometry

  1. Yu Fu,
  2. Songyun Xu,
  3. Chensong Pan,
  4. Mingliang Ye,
  5. Hanfa Zou

Published Online: 1 DEC 2007

DOI: 10.1002/0471142700.nc1012s31

Current Protocols in Nucleic Acid Chemistry

Current Protocols in Nucleic Acid Chemistry

How to Cite

Fu, Y., Xu, S., Pan, C., Ye, M. and Zou, H. 2007. 3,4-Diaminobenzophenone Matrix for Analysis of Oligonucleotides by MALDI-TOF Mass Spectrometry. Current Protocols in Nucleic Acid Chemistry. 31:10.12:10.12.1–10.12.6.

Author Information

  1. National Chromatographic R & A Center, Dalian Institute of Chemical Physics, Dalian, China

Publication History

  1. Published Online: 1 DEC 2007
  2. Published Print: DEC 2007

Abstract

This unit contains procedures for analysis of oligonucleotides by matrix-assisted laser desorption/ionization time-of-flight (MALDI-TOF) mass spectrometry with 3,4-diaminobenzophenone (DABP) as a matrix. This new matrix has demonstrated advantages in the analysis of oligonucleotides. With DABP as a matrix, intact oligonucleotide ions can be readily produced with lower laser powers, resulting in better detection limits, less fragmentation, and fewer alkali-metal ion adducts compared with results obtained using conventional matrices. Minimal fragmentation and fewer alkali-metal ion adducts were seen even at low oligonucleotide concentrations. It was also found that samples prepared with DABP are highly homogenous, therefore reducing the need to find “sweet spots” in MALDI. Finally, excellent shot-to-shot reproducibility, resolution, and signal-to-noise ratio are observed using the DABP matrix. Curr. Protoc. Nucleic Acid Chem. 31:10.12.1-10.12.6. © 2007 by John Wiley & Sons, Inc.

Keywords:

  • diaminobenzophenone;
  • DABP;
  • DNA;
  • oligonucleotide;
  • MALDI;
  • mass spectrometry;
  • matrix