title: Five new microsatellite polymorphisms at the q21 region of human chromosome 21.
abstract: Five clones, containing polymorphic CA-repeat sequences, have been isolated from a specific human chromosome 21 phage library and have been localised to band q21 of chromosome 21 using a somatic cell hybrid panel. These highly repetitive sequences (D21S1263, D21S1264, D21S1415, D21S1417 and D21S1420) have been characterised in the CEPH reference parents and have heterozygosities ranging from 0.30 to 0.81 and an average polymorphism information content (PIC) of 0.62. The relative order of these markers, based on the somatic cell hybrid panel, is cen-D21S1417, D21S1420-D21S1263, D21S1415-D21S1264-tel. The most polymorphic marker (D21S1264) has been included in the chromosome 21 genetic map. They have also been localised in the CEPH/Généthon YAC panel, providing a refined localisation of these polymorphic sequences. These five CA-repeat markers should provide a better characterisation of the q21 region of chromosome 21.
authors: Molecular Genetics Department, Hospital Duran i Reynals, Barcelona, Catalunya, Spain.
authors: A
authors: A
authors: Bosch
authors: S
authors: S
authors: Wiemann
authors: J
authors: J
authors: Guimerà
authors: W
authors: W
authors: Ansorge
authors: D
authors: D
authors: Patterson
authors: X
authors: X
authors: Estivill
mesh_terms: D000818:Animals; D001483:Base Sequence; D002874:Chromosome Mapping; D018244:Chromosomes, Artificial, Yeast; D002891:Chromosomes, Human, Pair 21; D006224:Cricetinae; D003412:Cricetulus; D017931:DNA Primers; D004276:DNA, Satellite; D005819:Genetic Markers; D006801:Humans; D006822:Hybrid Cells; D008969:Molecular Sequence Data; D011110:Polymorphism, Genetic; D012091:Repetitive Sequences, Nucleic Acid
chemical_list: D017931:DNA Primers; D004276:DNA, Satellite; D005819:Genetic Markers