Here we.Į2 F-6: a novel member of the E2 F family is an inhibitor of E2 F-dependent transcription In cells of higher eukaryotes, cyclin D-dependent kinases Cdk4 and Cdk6 and, possibly, cyclin E-dependent Cdk2 positively regulate the G1- to S-phase transition, by phosphorylating the retinoblastoma protein (pRb), thereby releasing E2 F transcription factors that control S-phase genes. We discuss this feature as the possible onset of superconductivity originating from a phase separation in a small fraction of the sample in the vicinity of the magnetic transition.Ĭyclin E-induced S phase without activation of the pRb/ E2 F pathway In the pressure range Ëœ7.5 -11 GPa a remarkable downturn in resistivity, which resembles a superconducting transition, is observed below 15 K. The insulator-to-metal transformation observed at a pressure of Ëœ7 GPa is accompanied by a loss of magnetic ordering and an isostructural phase transition. Below Ëœ7 GPa, Tl F e1.6 S e2 is an antiferromagnetically ordered semiconductor with a ThC r2 S i2 -type structure. The crystal structure, magnetic ordering, and electrical resistivity of Tl F e1.6 S e2 were studied at high pressures. Pressure-induced magnetic collapse and metallization of Tl F e1.6 S e2
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |