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Longitudinal sections of wt (A) and bcl-2 (B) nerves shown near the crush site (arrows) after neurobiotin injection in the corresponding eyes. This and the following images have been obtained at the confocal microscope as explained in Materials and Methods. The optic nerve head is located to the left. Note that, in both cases, resilient fibers fail to pass beyond the crush site and do not sprout.
