Reversible switch from hemoglobin A to C in sheep and recovery from anemia following experimental infection with Anaplasma ovis

Anemia causes a change in the type of circulating hemoglobin (Hb) in sheep carrying the βA-globin haplotype, where the Hb A is replaced with Hb C, unlike Hb B. The effect of the substitution of Hb A with Hb C on the recovery from anemia was investigated by comparing the hematological picture of sheep, following experimental infection with Anaplasma ovis. The blood values were obtained from 3 AB and 3 BB Hb sheep after the development of the disease where anemia is a pathognomonic symptom. The expression of the silent gene encoding for Hb C was detected by isoelectric focusing and quantified by high performance liquid chromatography. Both Hb AB genotype and Hb C occurrence were involved in the lower recovery from anemia in the trial

Genetic study of Murgese horse from genealogical data and microsatellites

The black or rarely roan Murgese is a mesomorph horse, mainly reared in Apulia, recently selected for the saddle. Thefirst official registry of Murgese was established in 1926. All the existing Murgese horses can be traced back to a smallnumber of founders (46 founder mares and 9 stallions). This work aims to monitor the genetic structure of the actualpopulation by analysing the available genealogical information from 2708 animals and a data-set containing 563 typingrecords of twelve microsatellites. Inbreeding coefficients were estimated for the whole sample and for the animals bornfrom 1992 to 1999. A total of 23 generations were found. The average inbreeding coefficient was 0.0165 for the last threegenerations, whereas inbreeding was below 2% in animals born in the 92-99 period. The contribution of founders wasunbalanced. The overall FIS coefficient estimation was 0.025 and suggests that mating is generally at random in the population.However, some statistics obtained from this study, i.e. the inbreeding coefficient higher than 0.015 in the 70 animalsof the 19th, 20th, and 21st generations, should induce breeders to more attention in planning mating

Expression and Purification of Recombinant Hemoglobin in Escherichia coli

Recombinant DNA technologies have played a pivotal role in the elucidation of structure-function relationships in hemoglobin (Hb) and other globin proteins. Here we describe the development of a plasmid expression system to synthesize recombinant Hbs in Escherichia coli, and we describe a protocol for expressing Hbs with low intrinsic solubilities. Since the α- and β-chain Hbs of different species span a broad range of solubilities, experimental protocols that have been optimized for expressing recombinant human HbA may often prove unsuitable for the recombinant expression of wildtype and mutant Hbs of other species.As a test case for our expression system, we produced recombinant Hbs of the deer mouse (Peromyscus maniculatus), a species that has been the subject of research on mechanisms of Hb adaptation to hypoxia. By experimentally assessing the combined effects of induction temperature, induction time and E. coli expression strain on the solubility of recombinant deer mouse Hbs, we identified combinations of expression conditions that greatly enhanced the yield of recombinant protein and which also increased the efficiency of post-translational modifications.Our protocol should prove useful for the experimental study of recombinant Hbs in many non-human animals. One of the chief advantages of our protocol is that we can express soluble recombinant Hb without co-expressing molecular chaperones, and without the need for additional reconstitution or heme-incorporation steps. Moreover, our plasmid construct contains a combination of unique restriction sites that allows us to produce recombinant Hbs with different α- and β-chain subunit combinations by means of cassette mutagenesis

International Factors and the 1964 Election

International issues are not usually seen as having been significant to the 1964 general election result. Harold Wilson made only limited references to foreign policy and defence during the campaign, while opinion polls showed that voters saw domestic questions as being far more important. Traditionally, international issues have had only a limited impact upon British general elections. But the 1964 election was one of the most closely run in history and this article argues that, interpreted broadly, international questions did have a real effect on the contest. The sitting prime minister Sir Alec Douglas-Home focused on the future of the nuclear deterrent for much of the campaign, while considerations about the country's relative decline in the world, reflected in chronic balance of payment problems, helped Labour's case that it was ‘time for a change’ at the top. Besides, the mid-1960s was a significant point for the country's global position: the post-war policy of ‘three circles’—in which Britain played a major role in Europe, maintained a global empire and influenced US policy via the ‘special relationship’—was being called into question. The question deserves to be asked, therefore, why there was not a more intense debate between the political leaders about Britain's international role