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微卫星序列是指广泛分布于染色体基因组中具高度多态性的简单串联重复序列 ,重复单位仅为 2～ 6个核苷酸 ,重复次数可达1 0～ 5 0次。真核细胞最常见的微卫星序列是 (ＣＡ) ｎ,约有 5× 1 0 4～ 7× 1 0 5 (ＣＡ) ｎ 重复散在于整个基因组。微卫星序列的重复单位可以是完全相同
Microsatellite sequences are simply tandem repeats with a high degree of polymorphism that are widely distributed in the genome of chromosomes. The number of repeat units is only 2 to 6 nucleotides and the number of repeats is 10 to 50 times. The most common microsatellite sequence in eukaryotic cells is (CA) n, with 5 × 10 4 ~ 7 × 10 5 (CA) n repeats scattered throughout the genome. The repeat units of microsatellite sequences can be exactly the same