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Figure 4 | BMC Bioinformatics

Figure 4

From: Efficient discovery of abundant post-translational modifications and spectral pairs using peptide mass and retention time differences

Figure 4

Scatter-histogram of Δ around the unit mass value 22 for data set 1. The Δ in the vicinity of each modification mass are assumed to come from a mixture of two Gaussian distributions produced by the random and the modification-related spectral pairs, respectively. The dense data points in the red square, which are automatically localized using the EM algorithm, are mostly derived from modification-related (cation:Na) spectral pairs.

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BMC Bioinformatics

ISSN: 1471-2105

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