{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,19]],"date-time":"2026-05-19T00:47:23Z","timestamp":1779151643097,"version":"3.51.4"},"reference-count":8,"publisher":"Oxford University Press (OUP)","issue":"2","license":[{"start":{"date-parts":[[2016,10,2]],"date-time":"2016-10-02T00:00:00Z","timestamp":1475366400000},"content-version":"vor","delay-in-days":2148,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc\/2.0\/uk\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2011,1,15]]},"abstract":"<jats:title>Abstract<\/jats:title>\n               <jats:p>Summary: We present a tool for control-free copy number alteration (CNA) detection using deep-sequencing data, particularly useful for cancer studies. The tool deals with two frequent problems in the analysis of cancer deep-sequencing data: absence of control sample and possible polyploidy of cancer cells. FREEC (control-FREE Copy number caller) automatically normalizes and segments copy number profiles (CNPs) and calls CNAs. If ploidy is known, FREEC assigns absolute copy number to each predicted CNA. To normalize raw CNPs, the user can provide a control dataset if available; otherwise GC content is used. We demonstrate that for Illumina single-end, mate-pair or paired-end sequencing, GC-contentr normalization provides smooth profiles that can be further segmented and analyzed in order to predict CNAs.<\/jats:p>\n               <jats:p>Availability: Source code and sample data are available at http:\/\/bioinfo-out.curie.fr\/projects\/freec\/.<\/jats:p>\n               <jats:p>Contact: \u00a0freec@curie.fr<\/jats:p>\n               <jats:p>Supplementary information: \u00a0Supplementary data are available at Bioinformatics online.<\/jats:p>","DOI":"10.1093\/bioinformatics\/btq635","type":"journal-article","created":{"date-parts":[[2010,11,17]],"date-time":"2010-11-17T01:33:59Z","timestamp":1289957639000},"page":"268-269","source":"Crossref","is-referenced-by-count":237,"title":["Control-free calling of copy number alterations in deep-sequencing data using GC-content normalization"],"prefix":"10.1093","volume":"27","author":[{"given":"Valentina","family":"Boeva","sequence":"first","affiliation":[{"name":"1 Institut Curie, 2INSERM, U900, Paris, F-75248, 3Mines ParisTech, Fontainebleau, F-77300 and 4INSERM, U830, Paris, F-75248 France"},{"name":"1 Institut Curie, 2INSERM, U900, Paris, F-75248, 3Mines ParisTech, Fontainebleau, F-77300 and 4INSERM, U830, Paris, F-75248 France"},{"name":"1 Institut Curie, 2INSERM, U900, Paris, F-75248, 3Mines ParisTech, Fontainebleau, F-77300 and 4INSERM, U830, Paris, F-75248 France"},{"name":"1 Institut Curie, 2INSERM, U900, Paris, F-75248, 3Mines ParisTech, Fontainebleau, F-77300 and 4INSERM, U830, Paris, F-75248 France"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Andrei","family":"Zinovyev","sequence":"additional","affiliation":[{"name":"1 Institut Curie, 2INSERM, U900, Paris, F-75248, 3Mines ParisTech, Fontainebleau, F-77300 and 4INSERM, U830, Paris, F-75248 France"},{"name":"1 Institut Curie, 2INSERM, U900, Paris, F-75248, 3Mines ParisTech, Fontainebleau, F-77300 and 4INSERM, U830, Paris, F-75248 France"},{"name":"1 Institut Curie, 2INSERM, U900, Paris, F-75248, 3Mines ParisTech, Fontainebleau, F-77300 and 4INSERM, U830, Paris, F-75248 France"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Kevin","family":"Bleakley","sequence":"additional","affiliation":[{"name":"1 Institut Curie, 2INSERM, U900, Paris, F-75248, 3Mines ParisTech, Fontainebleau, F-77300 and 4INSERM, U830, Paris, F-75248 France"},{"name":"1 Institut Curie, 2INSERM, U900, Paris, F-75248, 3Mines ParisTech, Fontainebleau, F-77300 and 4INSERM, U830, Paris, F-75248 France"},{"name":"1 Institut Curie, 2INSERM, U900, Paris, F-75248, 3Mines ParisTech, Fontainebleau, F-77300 and 4INSERM, U830, Paris, F-75248 France"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jean-Philippe","family":"Vert","sequence":"additional","affiliation":[{"name":"1 Institut Curie, 2INSERM, U900, Paris, 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