Electrophoretic analysis of specific proteins in the regenerating goldfish retinotectal pathway

Proteins in the goldfish retinotectal pathway were analyzed by 2-D gel electrophoresis, under conditions of optic nerve crush or eye removal. A specific cluster of proteins was detected, consisting of 4 components, all of which are highly concentrated in the intact optic nerve. Two components were not detectable in non-visual areas of the goldfish brain. The total cluster was diminished by about 80% in the denervated optic tectum, and its level was restored during optic nerve regeneration. These data were interpreted as evidence for visual system-specific proteins in the goldfish retinotectal pathway.