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Filtering criterion using several above scores is used to isolate correct identifications from random assignments. However, the filtering criterion was not favorably optimized up to now.<\/jats:p>\n          <\/jats:sec>\n          <jats:sec>\n            <jats:title>Results<\/jats:title>\n            <jats:p>In this study, we implemented a machine learning approach known as predictive genetic algorithm (GA) for the optimization of filtering criteria to maximize the number of identified peptides at fixed false-discovery rate (FDR) for SEQUEST database searching. As the FDR was directly determined by decoy database search scheme, the GA based optimization approach did not require any pre-knowledge on the characteristics of the data set, which represented significant advantages over statistical approaches such as PeptideProphet. Compared with PeptideProphet, the GA based approach can achieve similar performance in distinguishing true from false assignment with only 1\/10 of the processing time. Moreover, the GA based approach can be easily extended to process other database search results as it did not rely on any assumption on the data.<\/jats:p>\n          <\/jats:sec>\n          <jats:sec>\n            <jats:title>Conclusion<\/jats:title>\n            <jats:p>Our results indicated that filtering criteria should be optimized individually for different samples. The new developed software using GA provides a convenient and fast way to create tailored optimal criteria for different proteome samples to improve proteome coverage.<\/jats:p>\n          <\/jats:sec>","DOI":"10.1186\/1471-2105-8-323","type":"journal-article","created":{"date-parts":[[2007,8,31]],"date-time":"2007-08-31T06:13:30Z","timestamp":1188540810000},"update-policy":"http:\/\/dx.doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":22,"title":["Optimization of filtering criterion for SEQUEST database searching to improve proteome coverage in shotgun proteomics"],"prefix":"10.1186","volume":"8","author":[{"given":"Xinning","family":"Jiang","sequence":"first","affiliation":[]},{"given":"Xiaogang","family":"Jiang","sequence":"additional","affiliation":[]},{"given":"Guanghui","family":"Han","sequence":"additional","affiliation":[]},{"given":"Mingliang","family":"Ye","sequence":"additional","affiliation":[]},{"given":"Hanfa","family":"Zou","sequence":"additional","affiliation":[]}],"member":"297","published-online":{"date-parts":[[2007,8,31]]},"reference":[{"issue":"6928","key":"1695_CR1","doi-asserted-by":"publisher","first-page":"198","DOI":"10.1038\/nature01511","volume":"422","author":"R Aebersold","year":"2003","unstructured":"Aebersold R, Mann M: Mass spectrometry-based proteomics. 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