title: Isoelectric focusing identification of four freshwater fish commercially labeled "perch".
abstract: Isoelectric focusing (IEF) was used to distinguish 4 freshwater fish species that are sold in the European Union under the generic label of "perch": Perca fluviatilis (European perch), Lates niloticus (Nile perch), Stizostedion lucioperca (European pikeperch), and Morone chrysops x saxatilis (Sunshine bass). These species have different commercial values but are easily interchangeable because they are sold already filleted, in view of the numerous bones of the whole fish. IEF of the water-soluble proteins extracted from fish muscle resulted in species-specific patterns. None of the bands was common to all 4 species. Intraspecies polymorphism was low and did not concern the bands identified as characteristic of the species.
authors.affiliation: University of Milan, Department of Animal Pathology and Health, Biochemistry and Physiology Unit, Via Celoria 10, I-20133 Milan, Italy.
authors.forename: Anna
authors.initials: A
authors.lastname: Berrini
authors.forename: Valentina
authors.initials: V
authors.lastname: Tepedino
authors.forename: Vitaliano
authors.initials: V
authors.lastname: Borromeo
authors.forename: Camillo
authors.initials: C
authors.lastname: Secchi
mesh_terms: D000818:Animals; D001492:Bass; D004591:Electrophoresis, Polyacrylamide Gel; D007525:Isoelectric Focusing; D008460:Meat / Q000032:analysis*; D009124:Muscle Proteins / Q000737:chemistry; D010471:Perches / Q000502:physiology*; D011506:Proteins / Q000737:chemistry; D012519:Sarcoplasmic Reticulum / Q000737:chemistry; D013045:Species Specificity
chemical_list: D009124:Muscle Proteins; D011506:Proteins