title: The polymorphic 11.1 locus of Plasmodium falciparum.
abstract: Clone pPF11.1 encodes a Plasmodium falciparum antigen expressed during the intraerythrocytic cycle and containing tandem repeats of a 9 amino acid unit. We report here an analysis of the genomic region specific for 11.1, which extends over 30 kb. It contains two blocks of repeats, spanning 13 kb and 9 kb. The restriction map suggests that the locus may result from a gene duplication. The 11.1 region is present in all P. falciparum strains examined so far. Southern analysis of 8 distinct isolates indicates that the locus is highly polymorphic. Thus the pPF11.1 repeats constitute a sensitive and discriminating probe to type P. falciparum strains.
mesh_terms: D000483:Alleles; D000818:Animals; D000953:Antigens, Protozoan / Q000235:genetics; D003001:Cloning, Molecular; D004247:DNA / Q000235:genetics; D004262:DNA Restriction Enzymes; D005796:Genes; D009693:Nucleic Acid Hybridization; D010963:Plasmodium falciparum / Q000235:genetics* / Q000276:immunology; D012150:Polymorphism, Restriction Fragment Length; D012091:Repetitive Sequences, Nucleic Acid
chemical_list: D000953:Antigens, Protozoan; D004247:DNA; D004262:DNA Restriction Enzymes