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Biol Bull 109: 271-275. (October 1955)
© 1955 Marine Biological Laboratory
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CHANGES IN THE PROTOPLASM DURING MATURATION

L. V. HEILBRUNN 1 and WALTER L. WILSON 1

1 Dept. of Zoology, University of Pennsylvania, Philadelphia 4, Pa., Dept. of Physiology and Biophysics, College of Medicine, University of Vermont, Burlington, Vermont, and the Marine Biological Laboratory, Woods Hole, Mass.

When an immature egg of the worm Chaetopterus enters sea water, the protoplasm first undergoes a transient increase in viscosity, and then rapidly becomes more fluid than it was originally. These effects are believed to be due to a calcium-activated proteolytic enzyme which is also a clotting enzyme. In the course of the investigation, data were obtained as to the effect of temperature on the rate of germinal vesicle breakdown.






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Copyright © 1955 by the Marine Biological Laboratory.