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    • M Barua

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    • Volume 15 Issue 3 September 1990 pp 217-221

      Dephosphorylation of cell-surface phosphoproteins of goat spermatozoa

      M Barua G C Majumder

      More Details Abstract Fulltext PDF

      Multiple ecto-phosphoproteins of the goat cauda-epididymal intact spermatozoa have been shown to undergo dephosphorylationin vitro by endogenous phosphoprotein phosphatase(s) located on the sperm outer surface. The major ecto-phosphoproteins that are dephosphorylated have molecular masses of 27, 40, 70, 116 and 205 kDa. The cell surface dephosphorylation reaction is not dependent on bivalent metal ions. Mg2+ (5 mM), Mn2+ (5 mM), orthovanadate (200ΜM) and cAMP (5 ΜM) have no effect on this surface reaction whereas it is inhibited nearly 50% by Co2+ or Zn2+ (1 mM). Spermidine (5 mM), or Ca2+ (1mM) inhibited to a small extent (approx. 25%) the cell surface dephosphorylation of proteins.

  • Journal of Biosciences | News

      Forthcoming Special issue.


    • To trigger further research on plant mitochondria, the Journal of Biosciences is bringing out a special issue titled "Plant Mitochondria: Properties and Interactions with Other Organelles".


      Plant mitochondria are quite distinct and have unique features, such as a cyanide-insensitive alternate pathway. They also interact with chloroplasts to optimize photosynthetic carbon assimilation.


      Submissions are welcome until 30 July 2023. The contributions can be original articles, short communications, reviews, or mini-reviews on any topic related to plant mitochondria.


      Authors can submit their articles online at https://www.editorialmanager.com/jbsc/default2.aspx

      Posted on April 12, 2023
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      Posted on July 25, 2019

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