Transport of proteins and sulfated mucopolysaccharides in the goldfish visual system.

"-Proline, "H-asparagine and Na2W04 have been found to be highly specific markers for axonal transport in the goldfish visual system. The amino acids label both rapidly and slowly transported proteins while the 35S is recovered mainly with the rapidly transported materials, including protein-bound mucopolysaccharides. These precursors have been used to study the rate of transport, the subcellular distribution and the rate of turnover of transported proteins in the nerve terminals.