The CCRC Spectral Database for PMAA's
- To see the Partially Methylated Alditol Acetate
(PMAA) derived from a glycosidically linked sugar residue,
mouse over its entry in the PMAA Table.
- Click on the entry to see the electron-impact mass spectrum
(EI-MS) of the PMAA.
Click here for expanded help.
View the PMAA Table
PMAAs are formed by the following procedure
1:
- O-Methylation of the complex glycan.
- Hydrolysis of the methylated glycan.
- Reduction of the resulting partially methylated sugars.
- O-Acetylation of the resulting partially methylated alditols.
The position of the
O-acetyl and
O-methyl groups on the
PMAA reflect the ring form and linkage positions of the glycosyl residue
in the original glycan. PMAAs are usually analyzed by gas chromatography (gc)
coupled with electron-impact mass spectrometry (ei-ms).
Fragmentation patterns of PMAAs in the mass spectrometer follow
well-defined pathways, allowing the mass spectra of these derivatives
to be easily recognized
2.
- The PMAA derivatives displayed in this database were prepared by
Larry Elvebak, who also recorded and interpreted the mass spectra.
- All software for the graphical display and retrieval of spectra
was developed by William S. York.
To get more information or to make a comment regarding this database,
contact William S. York .
1Ciucanu (2006) Analytica Chimica Acta. 576: 147-155
2York, et al. (1985) Methods in Enzymology.
118: 3-40.
