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.
This ETD spectrum of m/z 642.03 (4+) was manually deciphered as representing the Na-adduct of TEELQQQNTAPT(GalNAcGalSA)NSPTK. CID and ETD data for the same glycopeptide from a protonated ion of a lower charge state are shown in Figure 1. Its MS spectrum is presented in Figure 4, where the upper panel clearly illustrates that at the higher charge state the solely protonated ion was practically non-existent. Asterisk-labeled fragments retained the Na-ion.
