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Biol Bull 110: 1-7. (February 1956)
© 1956 Marine Biological Laboratory
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CYTOCHROME OXIDASE IN ANTERIOR AND POSTERIOR BLASTOMERES OF CIONA INTESTINALIS

WILLIAM E. BERG 1

1 Department of Zoology, University of California, Berkeley 4, California

Anterior and posterior blastomeres were separated in the four-cell stage of Ciona intestinalis and cytochrome oxidase activities of homogenates of the blastomeres were quantitatively determined by a microspectrophotometric method. The average cytochrome oxidase activity of homogenates of posterior blastomeres is 2.7 times that of anterior blastomeres. The results indicate a localization of mitochondria in the posterior blastomeres.






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Copyright © 1956 by the Marine Biological Laboratory.