𝔖 Bobbio Scriptorium
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The fine structure of the sperm of a tunicate,Ascidia nigra

✍ Scribed by Schabtach, Eric ;Ursprung, Heinrich

Book ID
102336011
Publisher
John Wiley and Sons
Year
1965
Tongue
English
Weight
494 KB
Volume
159
Category
Article
ISSN
0022-104X

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✦ Synopsis

The ultrastructure of the spermatozoon of Ascidia nigra i s described. The head of this sperm contains an elongated nucleus flanked and surrounded by a single large mitochondrion. No other mitochondria are present. An acrosome is seen to extend over a large portion of the nucleus. The tail shows the typical 9 + 2 arrangement of fibrils, and in some region carries fins.

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## Abstract Ascidians are known to accumulate vanadium in their blood cells and have six to nine different types of blood cells. Among these cells, the signet ring cell has been newly identified as the vanadocyte (vanadium‐containing blood cell). We have raised monoclonal antibodies specific to the