Cover Picture: Cell cycle components change as neural progenitors advance along their specification routine. Dual immunolabeling of cyclin D1 (green) and cyclin D2 (red) proteins in the mouse E14.5 medial ganglionic eminence shows that most of the dividing cells lining the ventricular wall express cyclin D1. However, cyclin D2 positive progenitors predominate in the adjacent subventricular zone, where transit amplifying divisions occur before progenitors exit the cycle and migrate out of the region. Only rare cells are seen to express both cyclin D1 and cyclin D2.
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