M
Masafumi Nozawa
Researcher at Tokyo Metropolitan University
Publications - 41
Citations - 2538
Masafumi Nozawa is an academic researcher from Tokyo Metropolitan University. The author has contributed to research in topics: Gene & Genome. The author has an hindex of 18, co-authored 39 publications receiving 2280 citations. Previous affiliations of Masafumi Nozawa include National Institute of Genetics & National Institutes of Natural Sciences, Japan.
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Genomic drift and copy number variation of chemosensory receptor genes in humans and mice.
Masafumi Nozawa,Masatoshi Nei +1 more
TL;DR: The distribution of gene copy number for the OR gene family was approximately normal in both humans and mice, suggesting that genomic drift caused by random duplication and deletion of genes plays important roles in determining the evolutionary change of chemosensation.
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Response to Yang et al.: Problems with Bayesian methods of detecting positive selection at the DNA sequence level
TL;DR: Because the number of nucleotide substitutions per gene in the human lineage after separation from the chimpanzee is very small and BSM depends on the large sample theory, the theoretical basis of BSM was examined in comparison with the small-sample method (SSM) using Fisher's exact test, which gives accurate statistical tests for small samples.
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Accelerated pseudogenization on the neo-X chromosome in Drosophila miranda.
TL;DR: Comparing the pseudogenization process between genes on the neo-sex chromosomes in Drosophila miranda and their autosomal orthologues in closely related species suggests that both X and Y chromosomes can degenerate due to a complex suite of evolutionary forces.
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Elucidating the functional evolution of heat sensors among Xenopus species adapted to different thermal niches by ancestral sequence reconstruction.
TL;DR: Comparisons of the neuronal heat sensors TRPV1 and TRPA1 among closely related Xenopus species suggest that the functional properties of heat sensors changed during Xenopus evolution, potentially altering the preferred temperature ranges among species.
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Fine‐scale demographic processes resulting from multiple overseas colonization events of the Japanese stream tree frog, Buergeria japonica
TL;DR: The demographic history of the Japanese stream tree frog, Buergeria japonica, which is distributed on Amami Island and four northern neighbouring islands of the Tokara Archipelago, Japan is estimated to clarify how amphibians achieve overseas colonization.