Development of Hepatic Phosphorylase in the Chick Embryo.

Abstract
Summary Phosphorylase activity was measured in the liver of chick embryos at various stages of development. Enzyme activity increases abruptly between the 16th and 18th day of incubation, at a time when, according to previous studies, hepatic glycogen concentration and UDPG-glycogen transfer-ase activity decrease to relatively low values.