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Mass and sequence analysis of ρ-Da1b. (A) Isotopic profile of ρ-Da1b. (B) Peptide mass fingerprint of ρ-Da1b after trypsin treatment. (C) Fragmentation by MALDI-LIFT-TOF/TOF of the m/z 1680.68 ion (red arrow) obtained after trypsin digestion. b- and y-ion types used for the sequencing are indicated in red and blue, respectively.
