We have isolated a cDNA clone from a chicken
DNA expression library which codes for a ras-like polypeptide of 216 Buy Nike Air Max Online
amino acid residues. This polypeptide is closely related to the human protein TC4 and to the yeast protein Spil, two novel proteins that may be involved in the coordination of the cell cycle. In the amino-terminal region, the three polypeptides possess a P-loop motif characteristic of GTP-binding proteins. At the carboxy-terminal end, however, they lack the typical CAAX-box which is usually responsible for membrane anchorage of ras-like proteins. It is therefore likely that the three polypeptides define a new subclass of GTP-binding proteins within the ras-like superfamily.
A simple theoretical analysis of heat-and-mass transfer to a spherical water-droplet moving in humid Nike Air Force 1 Id
air has been made, in connection with the possible use of spray or mist cooling in railway tunnels and other systems. In particular, the histories of the temperature and diameter of the droplet, and the dependence of the time of complete evaporation (or life-time) on the initial size have been studied. The relationships between life-time and the maximum time the droplet may be air borne in the particular environment, (such as a tunnel), has been investigated using the settling time of a freely-falling droplet as a basis of measurement.