Jan 2, 2014

Power-law Null Model for Bystander Mutations in Cancer

BioRxiv : the Preprint Server for Biology
Loes Olde LoohuisBud Mishra


In this paper we study Copy Number Variation (CNV) data. The underlying process generating CNV segments is generally assumed to be memory-less, giving rise to an exponential distribution of segment lengths. In this paper, we provide evidence from cancer patient data, which suggests that this generative model is too simplistic , and that segment lengths follow a power-law distribution instead . We conjecture a simple preferential attachment generative model that provides the basis for the observed power-law distribution. We then show how an existing statistical method for detecting cancer driver genes can be improved by incorporating the power-law distribution in the null model.

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Mentioned in this Paper

Copy Number Polymorphism
Statistical Technique
Malignant Neoplasms

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