Biocatalytic oxidation of S-alkylcysteine derivatives by chloroperoxidase and Beauveria species

Treatment of N-methoxycarbonyl C-carboxylate ester derivatives of S-methyl- -cysteine by chloroperoxidase (CPO)/hydrogen peroxide resulted in oxidation at sulfur to produce the (R_S) sulfoxide in moderate to high diastereomeric excess (DE). The (S_S) natural product sulfoxide chondrine was obtained via biotransformation of the N-t.boc derivative of -4-S-morpholine-2-carboxylic acid using Beauveria bassiana or Beauveria caledonica.     

Three putative murine Teashirt orthologues specify trunk structures in Drosophila in the same way as the Drosophila teashirt gene

Drosophila teashirt (tsh) functions as a region-specific homeotic gene that specifies trunk identity during embryogenesis. Based on sequence homology, three tsh-like (Tsh) genes have been identified in the mouse. Their expression patterns in specific regions of the trunk, limbs and gut raise the possibility that they may play similar roles to tsh in flies. By expressing the putative mouse Tsh genes in flies, we provide evidence that they behave in a very similar way to the fly tsh gene. First, ectopic expression of any of the three mouse Tsh genes, like that of tsh, induces head to trunk homeotic transformation. Second, mouse Tsh proteins can rescue both the homeotic and the segment polarity phenotypes of a tsh null mutant. Third, following ectopic expression, the three mouse Tsh genes affect the expression of the same target genes as tsh in the Drosophila embryo. Fourth, mouse Tsh genes, like tsh, are able to induce ectopic eyes in adult flies. Finally, all Tsh proteins contain a motif that recruits the C-terminal binding protein and contributes to their repression function. As no other vertebrate or fly protein has been shown to induce such effects upon ectopic expression, these results are consistent with the idea that the three mouse Tsh genes are functionally equivalent to the Drosophila tsh gene when expressed in developing Drosophila embryos.     

Contextualising Professional Ethics: The Impact of the Prison Context on the Practices and Norms of Health Care Practitioners

Health care is provided in many contexts—not just hospitals, clinics, and community health settings. Different institutional settings may significantly influence the design and delivery of health care and the ethical obligations and practices of health care practitioners working within them. This is particularly true in institutions that are established to constrain freedom, ensure security and authority, and restrict movement and choice. We describe the results of a qualitative study of the experiences of doctors and nurses working within two women’s prisons in the state of New South Wales (NSW), Australia. Their accounts make clear how the provision and ethics of health care may be compromised by the physical design of the prison, the institutional policies and practices restricting movement of prisoners and practitioners, the focus on maintaining control and security, and the very purpose of the prison and prison system itself. The results of this study make clear the impact that context has on professional practice and illustrate the importance of sociology and anthropology to bioethics and to the development of a more nuanced account of professional ethics.