Degeneration of the Eyes of Tyrosine-Deficient Chick Embryos.
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.
Grau
C R
CR
Austic
R E
RE
Matteson
G C
GC