| tetrahymena australis (protozoa, ciliophora): a well-known but "non-existing" taxon - consideration of its identification, definition and systematic position. | a cryptic species of the tetrahymena pyriformis complex, tetrahymena australis, has been known for a long time but never properly diagnosed based on taxonomic methods. the species name is thus invalid according to the international code of zoological nomenclature. recently, a population isolated from a freshwater lake in wuhan, china was investigated using live observations, silver staining methods and gene sequence data. this organism can be separated from other described species of the t. pyri ... | 2016 | 27115713 |
| molecular and functional evolution of tetrahymena metallothioneins: new insights into the gene family of tetrahymena thermophila. | a new metallothionein (mtt-5) gene isoform has been cloned and characterized from the ciliate tetrahymena thermophila. its amino acid sequence shows only limited similarity with other tetrahymena mts. to investigate the transcriptional activity of this gene toward heavy metals (cd, cu, zn), mrna levels were evaluated by real-time quantitative pcr. results show that the three metals induce different mtt-5-mrna levels, cd treatment eliciting the most effective induction in the first 30 min. phylog ... | 2007 | 17208053 |