Gender and arson : psychosocial, psychological, and somatic offender characteristics at the time of the crime

Deliberate fire-setting, such as the crime of arson, can have devastating, even lethal, consequences. This study compared factors at the time of arson by female and male offenders in Sweden between 2000-2010. The women (n = 100), and men (n = 100) included in this study were randomly chosen from among all individuals who had been convicted for arson during this period and who underwent forensic psychiatric investigations. Information regarding psychiatric and somatic characteristics, their psychosocial situation, and whether they were in contact with health or social services before the arsons were examined. The results showed that both women and men have complex psychiatric and somatic characteristics, as well as psychosocial situations. Women showed more self-destructive behaviour, lower Global Assessment of Functioning scores, and had been in contact with psychiatric health services to a greater extent than men. More women than men had children. These findings suggest that specific actions may be needed for preventing and treating women compared with men at risk for committing arson

Functional interactions between membrane-bound transporters and membranes

One key role of many cellular membranes is to hold a transmembrane electrochemical ion gradient that stores free energy, which is used, for example, to generate ATP or to drive transmembrane transport processes. In mitochondria and many bacteria, the gradient is maintained by proton-transport proteins that are part of the respiratory (electron-transport) chain. Even though our understanding of the structure and function of these proteins has increased significantly, very little is known about the specific role of functional protein-membrane and membrane-mediated protein-protein interactions. Here, we have investigated the effect of membrane incorporation on proton-transfer reactions within the membrane-bound proton pump cytochrome c oxidase. The results show that the membrane acts to accelerate proton transfer into the enzyme’s catalytic site and indicate that the intramolecular proton pathway is wired via specific amino acid residues to the two-dimensional space defined by the membrane surface. We conclude that the membrane not only acts as a passive barrier insulating the interior of the cell from the exterior solution, but also as a component of the energy-conversion machinery