MS/MS spectra in four different instances that were used for annotation of An. gambiae genome. (A) MS/MS spectrum of a peptide, whose sequence validated an exon of a novel transcript encoding a peroxidase family of proteins ([ENSANG:P00000000593]); (B) MS/MS spectrum of a peptide used to identify a novel protein-coding gene. (C) MS/MS spectrum of a peptide that maps to a predicted UTR of a known transcript encoding Antigen 5-related 1 protein. (D) MS/MS spectrum corresponding to a peptide that is acetylated at its N-terminus. The acetyl moiety is denoted by Ac.