Jump to content

File:Choanoflagellate and human spermatozoon.jpg

Page contents not supported in other languages.
This is a file from the Wikimedia Commons
From Wikipedia, the free encyclopedia

Original file (1,934 × 843 pixels, file size: 121 KB, MIME type: image/jpeg)

Summary

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
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]

Licensing

w:en:Creative Commons
attribution
This file is licensed under the Creative Commons Attribution 4.0 International 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.

Captions

Comparison between a sperm cell and a choanoflagellate

Items portrayed in this file

depicts

inception

3 February 2019

media type

image/jpeg

checksum

cac142a7038fda41ae740e1feb0c4d9319ad0117

determination method or standard: SHA-1

data size

123,440 byte

height

843 pixel

width

1,934 pixel

File history

Click on a date/time to view the file as it appeared at that time.

Date/TimeThumbnailDimensionsUserComment
current03:16, 12 March 2020Thumbnail for version as of 03:16, 12 March 20201,934 × 843 (121 KB)EpipelagicUploaded a work by (A) Urutseg as original author (2009), (B) Kissping, (C) [http://www.bio.miami.edu/dana/160/160S13_13print.html] from De Loof, A. and Schoofs, L. (2019) [https://www.frontiersin.org/articles/10.3389/fnins.2019.00141/full "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}}. with UploadWizard

The following page uses this file:

Global file usage

Metadata

This file contains additional information, probably added from the digital camera or scanner used to create or digitize it.

If the file has been modified from its original state, some details may not fully reflect the modified file.

Retrieved from "https://en.wikipedia.org/wiki/File:Choanoflagellate_and_human_spermatozoon.jpg"