a: Image of a wing imaginal disc in which cells that ectopically express ELAV also ectopically express neuron-specific neuroglian (green). Inset: A high magnification image of cells ectopically expressing ELAV and immunoreacted for ELAV (red) and neuron-specific neuroglian (green).

b: Section through an elav mosaic eye imaginal disc immunoreacted for ELAV (red) and neuron-specific neuroglian (green) showing an ELAV-null patch that is also null for neuron-specific neuroglian.