Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Electron impact mass spectra of 2-O-methylgalactose PAAN derived from phosphonoglycans of Stackebrandtia, grown in the presence of l-[13C-methyl]methionine (A) or in the presence of l-methionine (control) (B). Structures and fragmentation patterns of the compound are shown in the insets. The peak labels in the spectra are observed values, whereas the numbers shown in the insets are calculated values.
