title: On invariants of a 2-D proteome map derived from neighborhood graphs.
abstract: We consider the problem of the construction of invariants for characterization of 2-D maps, such as 2-D proteome maps, 2-D NMR spectral maps, etc., that in addition to facilitating cataloguing such maps, can be used for comparison of maps and numerical evaluation of their degree of similarity. A novel approach, based on the concept that the nearest neighborhood of points (spots) on a map are sufficiently flexible to allow one not only to vary the number of points used for characterization of the map but also the density of information on their relative positions, is put forward. The method is illustrated with the Coomassie brilliant blue stained 2-D gel electrophoresis patterns of the proteomes from liver cells of healthy male Fisher F344 rats and the rats treated with four peroxisome proliferators.
authors.affiliation: National Institute of Chemistry, 1001 Ljubljana, Slovenia. mrandic@msn.com
authors.forename: Milan
authors.initials: M
authors.lastname: Randić
authors.forename: Nella
authors.initials: N
authors.lastname: Lers
authors.forename: Dejan
authors.initials: D
authors.lastname: Plavić
authors.forename: Subhash C
authors.initials: SC
authors.lastname: Basak
mesh_terms: D000818:Animals; D015180:Electrophoresis, Gel, Two-Dimensional; D022781:Hepatocytes / Q000737:chemistry; D008297:Male; D011506:Proteins / Q000737:chemistry; D020543:Proteome / Q000737:chemistry*; D040901:Proteomics / Q000379:methods*; D051381:Rats
chemical_list: D011506:Proteins; D020543:Proteome