The transport proteins integrated into the cell membrane are often highly selective about the chemicals they allow to cross. Full article >>>
Analysis of the complete genomesequence of Geobacter sulfurreducens has revealed that this organism has a high percentage of genes for putative electron-transport proteins and that the expression of these genes is likely to be highly regulated. Full article >>>
For example, most species lack glutathione peroxidase, glutathione reductase and respiratory-gas transport proteins and thus allow oxygen to diffuse directly into cells. Full article >>>
(Date:5/16/2008)...iomechanics and physiology from six universities, ...stitute of Technologys Media Lab, refute scientifi...us, a 21-year-old South African bilateral amputee ...e in the 400-meter race. Their conclusions were ba...otion Laboratory, under the direction of Professor...
(Date:5/15/2008)...s has developed a simple artificial cell with whic...two of the most basic cell components: the cell me...t surrounds the structures in living cells. The w...ake advantage of properties of cell organization t... findings will be published later this month (late...
(Date:5/15/2008)...improved the power output of one type of fuel cell...ould help these environmentally friendly energy st...arly in portable electronics. , The new material...ve than its conventional industrial counterpart, a...traditional fuel-cell membranes with these cost-ef...
(Date:5/15/2008)...le hydroxyl on another planet for the first time. ...ool to unlock the workings of Venuss dense atmosph...etect molecule, is made up of a hydrogen and oxyge...s of the Venusian atmosphere, some 100 km above th...Thermal Imaging Spectrometer, VIRTIS. , The elu...
...tan has yielded new evidence for domesticated hors...g of phosphorus-enriched soils inside what appear ...es, matches what would be expected from Earth once...s inhabited by people of the Botai culture of the ...food, tools, and transport. , "There,s very little...
...eiled a detailed map of human genetic variation wi...he most important region of the human genome encod...sease and organ transplantation. The work represen...ity for this fundamental immune region and lays th...t uncovering the genetic roots of immune-related d...
...an islands of Borneo and Sumatra, scientists from ...found what they say is the first demonstration in ...ilable food supplies and brain size. , Based on th...ns confined to part of Borneo where food supplies ...he process of natural selection comparatively smal...
... most their contemporaries were not wiped out by t...aleontologist who says multiple meteor impacts, ma...inated in the end of the Cretaceous Period. , The...er and earlier of a series of meteors and volcanic...n 500,000 years, say Princeton University paleonto...