Abstract
Described is an algorithm to find the longest interval having at least a specified minimum bias in a sequence of characters (bases, amino acids), e.g. 'at least 0.95 (A+T)-rich'. It is based on an algorithm to find the longest interval having a non-negative sum in a sequence of positive and negative numbers. In practice, it runs in linear time; this can be guaranteed if the bias is rational. Java code of the algorithm can be found at http://www.csse.monash.edu.au/~lloyd/tildeProgLang/Java2/Biased/. Examples of applications to Plasmodium falciparum genomic DNA can be found at the above URL.
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