4 GO terms found (0.019 seconds) obsolete renal rubidium ion transport OBSOLETE. The directed movement of rubidium ions (Rb+) by the kidney. obsolete rubidium ion transmembrane transporter activity OBSOLETE. Enables the transfer of rubidium ions (Rb+) from one side of a membrane to the other. obsolete rubidium ion transport OBSOLETE. The directed movement of rubidium ions (Rb+) into, out of or within a cell, or between cells, by means of some agent such as a transporter or pore. Rb-E2F complex A multiprotein complex containing a heterodimeric E2F transcription factor and a Retinoblastoma (Rb) family member. This complex is capable of repressing transcription of E2F-regulated genes in order to regulate cell cycle progression.