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ACKNOWLEDGEMENTS
We thank Mr. Jun Matsushita (Graduate School of Pharmaceutical Sciences, Kyoto
University) for mouse in vitro fertilization. This work was supported in part by the
MEXT/JSPS (KAKENHI Grant Number 21H02663, 20H03802 and 21K19565), Platform
Project for Supporting Drug Discovery and Life Science Research
(JP19am0101092j0003), Takeda Science Foundation, Kobayashi International Scholarship Foundation, the NAKATOMI Foundation, Vehicle Racing Commemorative
Foundation, Mother and Child Health Foundation and Japan Foundation for Applied
Enzymology.
AUTHOR CONTRIBUTIONS
A.I. and Y.M. are equally contributing first authors. Y.M., H.N. and A.I. conducted Ca2+
imaging analysis. A.I., Y.M., H.N., M.T., T.K., N.N., G-E.K., N.O., S.K. and M.N. conducted
biochemical and cell physiological analysis. S.K. conducted electron microscopy
analysis. A.I., Y.M. and H.T. drafted the manuscript. H.T. oversaw this project.
ETHICS APPROVAL AND CONSENT TO PARTICIPATE
All experiments in this study were conducted with the approval of the Animal
Research Committee according to the regulations on animal experimentation at
Kyoto University.
COMPETING INTERESTS
The authors declare no competing interests.
ADDITIONAL INFORMATION
Supplementary information The online version contains supplementary material
available at https://doi.org/10.1038/s41419-023-06285-y.
Correspondence and requests for materials should be addressed to Hiroshi
Takeshima.
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