Fig. 2. Comparison of DV and IV using HPLC-ESI-MS. The base peak ion chromatograms show the peptide profiles for the IV of two snails (A,C), and the corresponding DV from the same individuals (B,D, respectively). Abundant peptides are labeled by protonated monoisotopic mass (except 9433 Da, an average mass) or, where appropriate, by known or putative C. striatus toxins. Masses or peptides common to both DV samples are underlined.