Jablonski, Peter E.
B.S. (Bachelor of Science)
Department of Biological Sciences
Haloalkaliphilic Archaea, Natronococcus occultus is one of a few organisms which survive in soda lakes. It grows optimally in 3.4 M NaCl and pH 9. It is suspected that this organism has resistances to heavy metals because its distant relative, haloneutrophilic Archaea, had shown resistance to several different heavy metals. Although no haloneutrophilic Archaea had shown resistance to arsenate, several eubacteria had been tested positive for arsenate resistance. Natronococcus occultus was tested for arsenate resistance, partially because arsenate stays in solution even in 3.4 M NaCl and at pH9. The uptake rates of phosphate and arsenate are compared to investigate the mechanism of the resistance, because arsenate is an analog of phosphate and is known to be transported into the cell by a phosphate transport system.
Matsushima, Taeko, "Assessment of arsenate resistance in Haloalkaliphilic Archaea" (1996). Honors Capstones. 195.
Northern Illinois University
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