Cancer cells have imbalance of signals in cell cycle. Vero cells are a lineage of cells used in cell cultures. Diazepam binds with high affinity to glial cells in animal cell cultures. This results in cells with half the number of chromosomes present in the parent cell. They are stellate cells with many processes radiating from their cell bodies. Oxygen can easily diffuse through the red blood cell's cell membrane. This is a checkpoint mechanism to prevent over activation of the T cell. He voted against expanding research to more embryonic stem cell lines. Smith supports efforts to provide alternatives to embryonic stem cell research. Histones are proteins found in the nucleus of the cell. He supported limits on stem cell research. Basophils are a type of white blood cell. It signals through trimerization of FasR, which spans the membrane of the "target" cell. Primary polycythemias are due to factors intrinsic to red cell precursors. This factor is a measure of quality of a solar cell.