title: Polymorphism of complement factor I: population study in Japanese and phenotyping in bloodstains.
abstract: Polymorphism of the complement component factor I (IF) was investigated in 645 unrelated Japanese individuals using isoelectric focusing and immunoblotting. The allele frequencies were IF*A = 0.1031 and IF*B = 0.8969. The population data fitted the Hardy-Weinberg law. Phenotyping was also possible from bloodstains stored at 37 degrees C for up to 1 week, at room temperature for up to 2 weeks and at 4 degrees C for up to 5 weeks. The IF system can be a useful supplement for the medicolegal identification of bloodstains, but seems useless in Caucasoids.
authors.affiliation: Forensic Science Laboratory, Yamanashi Prefectural Police Headquarters, Kofu, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Dobashi
authors.forename: K
authors.initials: K
authors.lastname: Hashimoto
authors.forename: N
authors.initials: N
authors.lastname: Komatsu
authors.forename: A
authors.initials: A
authors.lastname: Kido
authors.forename: Y
authors.initials: Y
authors.lastname: Kimura
authors.forename: M
authors.initials: M
authors.lastname: Oya
mesh_terms: D001801:Blood Stains; D003172:Complement C1 / Q000235:genetics*; D005787:Gene Frequency; D006801:Humans; D007525:Isoelectric Focusing; D007564:Japan; D010641:Phenotype; D011110:Polymorphism, Genetic
chemical_list: D003172:Complement C1