Caesium bromide molecule

Ammonium Dioxalato - diammino - chromium, [Cr(NH3)2 (C204)2]NH4.2H20, is obtained in red needles by acting upon dibromo-diaquo-diammino-chromic bromide with aqueous oxalic acid at a temperature of 60° C. The colour changes in solution to dark red and the salt separates. From the ammonium salt other salts may be prepared by treating an aqueous solution with metallic halide. The potassium salt crystallises in red needles containing two molecules of water the sodium salt crystallises in dark red prisms the lithium salt in red needles or leaflets and the caesium salt in dark red needles. These salts are very stable and may be reerystallised from water. 

H. citelli, H. diminuta and H. microstoma, one of which is mitochondrial DNA (mtDNA) (394). The mtDNA of H. diminuta has been isolated (118) and has been shown to be a typical circular molecule. The characteristics of H. diminuta DNA are shown in Table 6.11. In contrast, E. multilocularis and E. granulosus produced two distinct DNA bands after fractionation in caesium chloride, but there was no evidence that the DNA from either band represented mtDNA (493). There is presumably so little mtDNA in comparison to nuclear DNA in these organisms that it is completely masked in preparations of total DNA by this method. That this is the case has been shown by a recent study (976), where a different procedure, based on the selective precipitation of nucleic acids by cetyltrimethylammonium bromide (CTAB), was employed to extract mtDNA from isolated mitochondria. Some 300 g and 50 g, respectively, of Taenia spp. and Echinococcus sp. tissue yielded approximately only 1 ng mtDNA. 

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