对ECOR菌株库中部分大肠杆菌菌株与大肠杆菌K-12的rRNA操纵子的小16S至23S基因间隔区（ISR）进行比较。
Comparison of the small 16S to 23S intergenic spacer region (ISR) of the rRNA operons of some Escherichia coli strains of the ECOR collection and E. coli K-12.
作者信息
García-Martínez J, Martínez-Murcia A, Antón A I, Rodríguez-Valera F
机构信息
Departamento de Genética y Microbiología, Universidad de Alicante, Spain.
出版信息
J Bacteriol. 1996 Nov;178(21):6374-7. doi: 10.1128/jb.178.21.6374-6377.1996.
Abstract
Several 16S to 23S spacers of 354 bp have been sequenced from six Escherichia coli strains belonging to the ECOR collection. Four phylogenetically informative variable sites were identified. The results of their comparison confirm the existence of two major phylogenetic branches in this species, as previously reported. Remarkable intercistronic heterogeneity was found in strain ECOR35 and its closest relatives, in which at least one of the operons has suffered a major mutagenic event or has an independent phylogenetic origin.
摘要
从属于ECOR菌株库的6株大肠杆菌中，对几个354 bp的16S至23S间隔区进行了测序。鉴定出4个系统发育信息可变位点。它们的比较结果证实了该物种中存在两个主要的系统发育分支，如先前报道的那样。在菌株ECOR35及其最亲近的亲缘菌株中发现了显著的顺反子间异质性，其中至少有一个操纵子经历了重大的诱变事件或具有独立的系统发育起源。
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