Nucleic Acids Research, 1983, Vol. 11, No. 23 8431-8441
© 1983
CHEMISTRY |
Mas spectrometric monitoring of solid phase phosphate triester synthesis of DNA fragments
Humboldt University, Department of Chemistry DDR-1040 Berlin, Invalidenstrasse 42, GDR
Received September 12, 1983. Revised November 9, 1983. Accepted November 9, 1983.
A new and convenient pyrolysis mass spectrometric approach for monitoring solid phase phosphate triester synthesis of oligodeoxyribonucleotides in 5'3' direction has been developed. The base-typical fragment ions produced by pyrolysis at 280°C of the polymer-bound oligonucleotide triesters in the mass spectrometer permit the analytical monitoring of DNA chain growth, using simple mathematical operations. The base composition can be determined directly from the polymer. In addition, minor nucleosides can easily be detected.