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. 2014 Jan 24;15(Suppl 1):S9. doi: 10.1186/1471-2164-15-S1-S9

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© Liu et al.; licensee BioMed Central Ltd. 2014

This article is published under license to BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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A comparison of the conditional spectral probabilities (for PrSMs with one PTM) estimated by the random database-based method and TD-GF. For each of the 101 test PrSMs, the error of the conditional spectral probability reported by TD-GF is computed. For each cut-off of e, the number of PrSMs with an error < e is counted.