Figure 2From: Identification of b-/y-ions in MS/MS spectra using a two stage neural network Isotopologue histograms. (a) The experimental mass offset (δ') and relative intensity (y') for the first isotopologue of a b-/y-ion. (b) The experimental mass offset and relative intensity for the first isotopologue of an unknown ion (not b-/y-ion). (c) The log-odds ration between (a) and (b)Back to article page