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.
Pfj fraction does not contain glycosphingolipids: positive-ion electrospray mass spectra of ganglioside GM1 (A), used as an authentic glycosphingolipid standard to validate the analytical method, and of the Pfj fraction (B). The data were normalized to the intensity of the most abundant [M + 2H]2+ doubly charged GM1 ganglioside ion (m/z 809.9, 100%) in panel A. Only low-intensity, singly charged (nonglycosphingolipid) ions were observed in the Pfj sample.
