Clark C G, Cross G A
Laboratory of Molecular Parasitology, Rockefeller University, New York, New York 10021-6399.
J Protozool. 1988 May;35(2):326-9. doi: 10.1111/j.1550-7408.1988.tb04352.x.
We have recently shown that the ribosomal RNA genes of the amoebo-flagellate Naegleria gruberi Schardinger, 1899, strain NEG-M are carried exclusively on a 14 kilobasepair plasmid. To explore the distribution of this unique gene arrangement, we have examined another strain of N. gruberi and four other species from the order Schizopyrenida. All have this unusual gene arrangement although the size of the plasmid varies widely. Species groups based on morphological criteria do not agree with those resulting from comparison of plasmid restriction enzyme patterns.
我们最近发现，变形鞭毛虫纳氏虫（Naegleria gruberi Schardinger，1899年）NEG-M菌株的核糖体RNA基因仅存在于一个14千碱基对的质粒上。为了探究这种独特基因排列的分布情况，我们检测了纳氏虫的另一个菌株以及裂殖目（Schizopyrenida）的其他四个物种。尽管质粒大小差异很大，但所有这些物种都有这种不寻常的基因排列。基于形态学标准划分的物种组与根据质粒限制性酶切图谱比较得出的物种组并不一致。
