title: RankProdIt: A web-interactive Rank Products analysis tool.
abstract: BACKGROUND
  The first objective of a DNA microarray experiment is typically to generate a list of genes or probes that are found to be differentially expressed or represented (in the case of comparative genomic hybridizations and/or copy number variation) between two conditions or strains. Rank Products analysis comprises a robust algorithm for deriving such lists from microarray experiments that comprise small numbers of replicates, for example, less than the number required for the commonly used t-test. Currently, users wishing to apply Rank Products analysis to their own microarray data sets have been restricted to the use of command line-based software which can limit its usage within the biological community.
  
  
  RESULTS
  Here we have developed a web interface to existing Rank Products analysis tools allowing users to quickly process their data in an intuitive and step-wise manner to obtain the respective Rank Product or Rank Sum, probability of false prediction and p-values in a downloadable file.
  
  
  CONCLUSIONS
  The online interactive Rank Products analysis tool RankProdIt, for analysis of any data set containing measurements for multiple replicated conditions, is available at: http://strep-microarray.sbs.surrey.ac.uk/RankProducts.
authors.affiliation: Faculty of Health and Medical Sciences, University of Surrey, Guildford, Surrey, GU2 7XH, UK. e.laing@surrey.ac.uk.
authors.forename: Emma
authors.initials: E
authors.lastname: Laing
authors.forename: Colin P
authors.initials: CP
authors.lastname: Smith