Ascertainment

... (i) Promoter elements are usually short (6-30bp) (ii) They are usually found in the UTRs, first intron, and promoter Granted, there is an issue of ascertainment bias in these claims, but these are the assumptions that motif-detection algorithms (like the ones MEME and AlignACE use) are based on. ...

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... diseases (e.g., malaria [19] and tuberculosis [20]). Moreover, the counts of emerging and reemerging pathogen species reported here are subject to ascertainment bias. Despite these caveats, our results suggest that pathogens associated with emerging and reemerging diseases share some common features.".."Even ...

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