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Storage granule

storage granule

1. (Science: cell biology) membrane bounded vesicles containing condensed secretory materials (often in an inactive, zymogen, form). Otherwise known as zymogen granules or condensing vacuoles.

2. Granules found in plastids or in cytoplasm, assumed to be food reserves, often of glycogen or other carbohydrate polymer.

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The initiating Ca 2+ ion

Ca2+ ion released from intracellular storage in the egg upon fertilizaation, starting at the point of sperm entry. This calcium wave is the initiator of the cortical granule reaction that slowly blocks polyspermy and creates the fertilization envelope. Beginning ...

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by kolean
Wed Jul 01, 2009 2:15 pm
Forum: Cell Biology
Topic: The initiating Ca 2+ ion
Replies: 3
Views: 3012

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