title: Degeneration of the Eyes of Tyrosine-Deficient Chick Embryos.
abstract: Subjecting 4-day-old chick embryos to a yolk-sac perfusion medium lacking tyrosine resulted in arrest of retinal pigmentation and in degeneration of the neural retina. Phenylaldnine was ineffective in replacing tyrosine. Possibly retinal tyrosinase played a part in initiating the degenerative changes.
authors.forename: C R
authors.initials: CR
authors.lastname: Grau
authors.forename: R E
authors.initials: RE
authors.lastname: Austic
authors.forename: G C
authors.initials: GC
authors.lastname: Matteson