Spermatozoa Chemotaxis: Difference between revisions
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==Sea Urchin Spermatozoa Chemotaxis== | ==Sea Urchin Spermatozoa Chemotaxis== | ||
Modern version<ref><pubmed>23183693</pubmed>| [http://jgp.rupress.org/content/140/6/583.long J Gen Physiol.]</ref> of Lillie's historic 1902 sea urchin spermatozoa experiment.<ref><pubmed>17735765</pubmed></ref> | Modern version<ref name=PMID17735765><pubmed>23183693</pubmed>| [http://jgp.rupress.org/content/140/6/583.long J Gen Physiol.]</ref> of Lillie's historic 1902 sea urchin spermatozoa experiment.<ref><pubmed>17735765</pubmed></ref> | ||
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Kaubb's 2012 experiment<ref name=PMID17735765><pubmed>23183693</pubmed>| [http://jgp.rupress.org/content/140/6/583.long J Gen Physiol.]</ref> showing release of resact with a UV flash induces accumulation of sperm in the illuminated area while an annulus around the flash becomes depleted of sperm. After several seconds, the gradient dissipates because of resact binding and diffusion. (text from figure legend) | |||
[http://www.uniprot.org/uniprot/P11760 Resact] - Causes stimulation of sperm respiration and motility through intracellular alkalinization, transient elevations of cAMP, cGMP and calcium levels in sperm cells, and transient activation and subsequent inactivation of the membrane form of guanylate cyclase. | |||
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Sea Urchin Spermatozoa ChemotaxisModern version[1] of Lillie's historic 1902 sea urchin spermatozoa experiment.[2]
Chemotaxis is the attractive movement of an organism in response to a chemical stimulus, usually toward or "up" the chemical concentration gradient.
Kaubb's 2012 experiment[1] showing release of resact with a UV flash induces accumulation of sperm in the illuminated area while an annulus around the flash becomes depleted of sperm. After several seconds, the gradient dissipates because of resact binding and diffusion. (text from figure legend)
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Reference
- ↑ 1.0 1.1 <pubmed>23183693</pubmed>| J Gen Physiol.
- ↑ <pubmed>17735765</pubmed>
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