This work has been support, in part, by Grants from the
National Institutes of Health – Institute of Drug Abuseand the Florida Center for Excellence for Biomolecular
Identification and Targeted Therapeutics (FCoE-BITT Grant no.
GALS020) and support from the Mass Spectrometry and Peptide
Facility, Department of Chemistry, University of South Florida.
The authors dedicate this work to the memory of Dr. Mitchell E.
Johnson