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ECB-ART-30622
Biol Bull 1977 Feb 01;1521:64-74. doi: 10.2307/1540727.
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Morphological and cytochemical studies on the secretory granules of the pyloric caeca of the starfish, Asterias amurensis.

Hori SH , Tanahashi K , Matsuoka N .


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A fraction rich in secretory granules was prepared from the pyloric caeca of Asterias amurensis by sucrose density gradient centrifugation. The freshly prepared fraction exhibited no casein-hydrolyzing activity, but showed nine times as much specific activity as that of tissue homogenates after incubation at 37 degrees C for thirty minutes. Electron microscopy showed that the secretory granules were membrane-bound granules measuring 0.5-2.0 mu in diameter and contained dense and/or light amorphous substances.

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