This Week in The Journal

Pictured are two oligodendrocytes in layer 1 of the mouse cerebral cortex. Both cells are labeled by CNP (cyan), an oligodendrocyte marker. At the left is a mature oligodendrocyte, as evidenced by colabeling with carbonic anhydrase II (blue). At the right is a differentiating oligodendrocyte, as evidenced by a larger soma and labeling with procaspase-3 (red). See Kamen et al. for more information.