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.
Low-energy CID resolved fragmentation curves upon further dissociation of the b5+ product ions (■) from (A) doubly protonated RVYIFPF and (B) doubly protonated RVYIHPF. The fragment ions plotted are the a5+ ions (●), b5* (▲), and a5* (⋆) ions. The inserts show the structures of a generic b ion (oxazolone; part A) and the proposed b ion at histidine.
