ABSTRACT
Ultracentrifugal and electrophoretic analysis of chick embryo yolk water-soluble fraction (WSF) has been carried out using fertile non-incubated eggs and at 10, 15 and 21 days incubation.
Ultracentrifugal and electrophoretic analysis of WSF globulins has been carried out at the same incubation stages.
The ultracentrifugal and electrophoretic patterns of both the WSF and its globulin components at 10 days incubation are very similar to those observed in non-incubated eggs.
Ultracentrifugal and electrophoretic patterns at 15 and 21 days incubation undergo marked changes due to the appearance of egg-white proteins in the yolk.
The significance of these findings in relation to embryogenesis is discussed.
copyright © 1968 by Company of Biologists
1968
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