与其他高等真核生物不同,原生动物门 的寄生虫具有典型多变的染色体核型。如寄生于肠道内的贾第鞭毛虫带有明显的rDNA染色体的变异,即使是无性繁殖系株也是如此。该染色体在电泳中对溴化乙锭着色稳定。通过更高的密度图谱成像,能显示高清晰的序列图形,可达到比较核型的目的。作者选择十二指肠贾第鞭毛虫虫株主要2-Mb染色体中显著特征的图谱作为适当的标志,对各虫株进行了比较。 Unlike other higher eukaryotes, protozoan door parasites have a typically variable chromosomal karyotype. Such as giardiasis parasitic in the intestine with significant variation of rDNA chromosomes, even in clonal lines. This chromosome is stable to ethidium bromide during electrophoresis. Imaging through a higher density of the spectrum, can display high-resolution sequence of images, can achieve the purpose of comparing karyotype. The authors selected maps of prominent features of the major 2-Mb chromosome of the Giardia duodenalis strain as suitable markers for comparison of individual strains.