(A) Urutseg as original author (2009), (B) Kissping, (C) [1]
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Description: English: The calcium homeostasis of "modern" sperm cells looks very similar to that of "ancient" choanoflagellates. The reasoning underlying the comparison between a sperm cell and a choanoflagellate is: If we want to better understand the role of the insect male accessory gland juvenile hormone (MAG-JH), we should ask which evolutionarily ancient functions could be stimulated by the presence of JH (or farnesol) or inhibited by its absence. Farnesol is very ancient in evolution. The type of membrane receptor inhibited by farnesol (and its esters), namely a voltage-gated Ca2+ channel type (among other candidates) is also evolutionarily ancient. It goes back at least as far as the Opisthokonta (or Choanozoa), unicellular organisms with a flagellum, which preceded the animals. Date: 3 February 2019, 17:27:43. Source: De Loof, A. and Schoofs, L. (2019) "Mode of action of farnesol, the 'noble' unknown in particular in Ca (2+) homeostasis, and its juvenile hormone-esters in evolutionary retrospect". Frontiers in Neuroscience, 13: 141. doi:10.3389/fnins.2019.00141. Author: (A) Urutseg as original author (2009), (B) Kissping, (C) [1].
Description: phase contrast image of Monosiga brevicollis, by Stephen Fairclough. Date: 8 June 2007. Source: copied from en:Image:Monosiga_Brevicollis_Phase.jpg. Author: Stephen Fairclough. Permission(Reusing this file): : This file is licensed under the Creative CommonsAttribution-Share Alike 2.5 Generic license. :. You are free: to share – to copy, distribute and transmit the work to remix – to adapt the work Under the following conditions: attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original. https://creativecommons.org/licenses/by-sa/2.5 CC BY-SA 2.5 Creative Commons Attribution-Share Alike 2.5 truetrue.
