Cesium (Cs) Cesium (Cs), also spelled caesium, chemical element of Group 1 (also called Group Ia) of the periodic table, the alkali metal group, and the first element to be discovered spectroscopically (1860), by German scientists Robert Bunsen and Gustav Kirchhoff, who named it for the unique blue lines of its spectrum (Latin caesius, âsky-blueâ).
The final step of the elongation cycle is translocation, which brings the ribosome into the âposttranslocationalâ (POST) state, with an empty A site, peptidyl-tRNA in the P site, and deacylated tRNA in the E site. Translocation is catalyzed by the binding of EF-G and subsequent GTP hydrolysis. The movement of the tRNA molecules is concomitant with the movement of the bound mRNA chain by the length of three bases, allowing the next codon of mRNA in the ribosomal A site to be presented for decoding.
bifurcation. 1. a division into two branches. 2. the point at which division into two branches occurs. Carotid bifurcation: the site of division of the common carotid artery into the external and internal carotid arteries.ifurcation. 1. a division into two branches. 2. the point at which division into two branches occurs. tracheal bifurcation. termination of the trachea, where it divides into two principal bronchi.