title: Correspondence analysis applied to microarray data.
abstract: Correspondence analysis is an explorative computational method for the study of associations between variables. Much like principal component analysis, it displays a low-dimensional projection of the data, e.g., into a plane. It does this, though, for two variables simultaneously, thus revealing associations between them. Here, we demonstrate the applicability of correspondence analysis to and high value for the analysis of microarray data, displaying associations between genes and experiments. To introduce the method, we show its application to the well-known Saccharomyces cerevisiae cell-cycle synchronization data by Spellman et al. [Spellman, P. T., Sherlock, G., Zhang, M. Q., Iyer, V. R., Anders, K., Eisen, M. B., Brown, P. O., Botstein, D. & Futcher, B. (1998) Mol. Biol. Cell 9, 3273-3297], allowing for comparison with their visualization of this data set. Furthermore, we apply correspondence analysis to a non-time-series data set of our own, thus supporting its general applicability to microarray data of different complexity, underlying structure, and experimental strategy (both two-channel fluorescence-tag and radioactive labeling).
authors.affiliation: Department of Theoretical Bioinformatics, German Cancer Research Center, PO 101949, D-69009 Heidelberg, Germany.
authors.forename: K
authors.initials: K
authors.lastname: Fellenberg
authors.forename: N C
authors.initials: NC
authors.lastname: Hauser
authors.forename: B
authors.initials: B
authors.lastname: Brors
authors.forename: A
authors.initials: A
authors.lastname: Neutzner
authors.forename: J D
authors.initials: JD
authors.lastname: Hoheisel
authors.forename: M
authors.initials: M
authors.lastname: Vingron
mesh_terms: D002453:Cell Cycle; D018797:Cell Cycle Proteins / Q000235:genetics; D003627:Data Interpretation, Statistical; D015870:Gene Expression; D020411:Oligonucleotide Array Sequence Analysis / Q000379:methods*; D017027:Protein Tyrosine Phosphatases; D012441:Saccharomyces cerevisiae / Q000235:genetics; D029701:Saccharomyces cerevisiae Proteins; D014158:Transcription, Genetic
chemical_list: C074860:CDC14 protein, S cerevisiae; D018797:Cell Cycle Proteins; D029701:Saccharomyces cerevisiae Proteins; D017027:Protein Tyrosine Phosphatases