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JOURNAL ARTICLES
Two CDC25 homologues are differentially expressed during mouse development
D. Wickramasinghe, S. Becker, M.K. Ernst, J.L. Resnick, J.M. Centanni, L. Tessarollo, L.B. Grabel, P.J. Donovan
Development 1995 121: 2047-2056;
D. Wickramasinghe
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S. Becker
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M.K. Ernst
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J.L. Resnick
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J.M. Centanni
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L. Tessarollo
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L.B. Grabel
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P.J. Donovan
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Summary

The cdc25 gene product is a tyrosine phosphatase that acts as an initiator of M-phase in eukaryotic cell cycles by activating p34cdc2. Here we describe the cloning and characterization of the developmental expression pattern of two mouse cdc25 homologs. Sequence comparison of the mouse genes with human CDC25 genes reveal that they are most likely the mouse homologs of human CDC25A and CDC25B respectively. Mouse cdc25a, which has not been described previously, shares 84% sequence identity with human CDC25A and has a highly conserved phosphatase domain characteristic of all cdc25 genes. A glutathione-S-transferase-cdc25a fusion protein can hydrolyze para-nitro-phenylphosphate confirming that cdc25a is a phosphatase. In adult mice, cdc25a transcripts are expressed at high levels in the testis and at lower levels in the ovary, particularly in germ cells; a pattern similar to that of twn, a Drosophila homolog of cdc25. Lower levels of transcript are also observed in kidney, liver, heart and muscle, a transcription pattern that partially overlaps, but is distinct from that of cdc25b. Similarly, in the postimplantation embryo cdc25a transcripts are expressed in a pattern that differs from that of cdc25b. cdc25a expression is observed in most developing embryonic organs while cdc25b expression is more restricted. An extended analysis of cdc25a and cdc25b expression in preimplantation embryos has also been carried out. These studies reveal that cdc25b transcripts are expressed in the one-cell embryo, decline at the two-cell stage and are re-expressed at the four-cell stage, following the switch from maternal to zygotic transcription which mirrors the expression of string, another Drosophila homolog of cdc25. In comparison, cdc25a is not expressed in the preimplantation embryo until the late blastocyst stage of development, correlating with the establishment of a more typical G1 phase in the embryonic cell cycles. Both cdc25a and cdc25b transcripts are expressed at high levels in the inner cell mass and the trophectoderm, which proliferate rapidly prior to implantation. These data suggest the cdc25 genes may have distinct roles in regulating the pattern of cell division during mouse embryogensis and gametogenesis.

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JOURNAL ARTICLES
Two CDC25 homologues are differentially expressed during mouse development
D. Wickramasinghe, S. Becker, M.K. Ernst, J.L. Resnick, J.M. Centanni, L. Tessarollo, L.B. Grabel, P.J. Donovan
Development 1995 121: 2047-2056;
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JOURNAL ARTICLES
Two CDC25 homologues are differentially expressed during mouse development
D. Wickramasinghe, S. Becker, M.K. Ernst, J.L. Resnick, J.M. Centanni, L. Tessarollo, L.B. Grabel, P.J. Donovan
Development 1995 121: 2047-2056;

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An interview with Swathi Arur

Swathi Arur joined the team at Development as an Academic Editor in 2020. Her lab uses multidisciplinary approaches to understand female germline development and fertility. We met with her over Zoom to hear more about her life, her career and her love for C. elegans.


Jim Wells and Hanna Mikkola join our team of Editors

We are pleased to welcome James (Jim) Wells and Hanna Mikkola to our team of Editors. Jim joins us a new Academic Editor, taking over from Gordan Keller, and Hanna joins our team of Associate Editors. Find out more about their research interests and areas of expertise.


New funding scheme supports sustainable events

As part of our Sustainable Conferencing Initiative, we are pleased to announce funding for organisers that seek to reduce the environmental footprint of their event. The next deadline to apply for a Scientific Meeting grant is 26 March 2021.


Read & Publish participation continues to grow

“I’d heard of Read & Publish deals and knew that many universities, including mine, had signed up to them but I had not previously understood the benefits that these deals bring to authors who work at those universities.”

Professor Sally Lowell (University of Edinburgh) shares her experience of publishing Open Access as part of our growing Read & Publish initiative. We now have over 150 institutions in 15 countries and four library consortia taking part – find out more and view our full list of participating institutions.


Upcoming special issues

Imaging Development, Stem Cells and Regeneration
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The Immune System in Development and Regeneration
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Submission deadline: 1 September 2021
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Both special issues welcome Review articles as well as Research articles, and will be widely promoted online and at key global conferences.


Development presents...

Our successful webinar series continues into 2021, with early-career researchers presenting their papers and a chance to virtually network with the developmental biology community afterwards. Here, Brandon Carpenter talks about how inherited histone methylation defines the germline versus soma decision in C. elegans. 

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