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Biol Bull 100: 159-164. (June 1951)
© 1951 Marine Biological Laboratory
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CYTOCHROME OXIDASE AND SUCCINIC DEHYDROGENASE CONTENT OF SQUID (LOLIGO PEALII) NERVOUS TISSUE

S. J. COOPERSTEIN 1 and ARNOLD LAZAROW 1

1 Western Reserve University School of Medicine and Marine Biological Laboratory, Woods Hole, Mass.

1. The cytochrome oxidase and succinic dehydrogenase contents of various squid tissues, including giant axone and samples of axoplasm, have been determined and compared with previous findings in dogs. In the case of both enzymes studied, the stellate ganglion of the squid is approximately 1.5 times as active as squid muscle. Squid ganglion has approximately six times as much cytochrome oxidase as the other nervous tissues examined, but only about two times as much succinic dehydrogenase. Our findings, in contrast to previously reported results, reveal no evidence of concentration of these enzymes in axoplasm.

2. The markedly low (or absent) succinic dehydrogenase content which was found in dog nerve and white matter was not observed in the case of the squid nerve, axoplasm, or sheaths.






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Copyright © 1951 by the Marine Biological Laboratory.