Jinya Otsuka

Theoretical Insights into the Formation and Functional Roles of Stem Cells during Cell Differentiation in Higher Animals

Jinya Otsuka · Annual Research & Review in Biology · 2025

The theoretical formulation of cell differentiation forming the stem cells is used to explain the growth, metamorphosis, germ cell production and death in the higher animal, which develops many organs and tissues through multiple steps of cell differentiation.   Although the stem...

Open access Research Article 10.9734/arrb/2025/v40i112333

The Evolutionary Theory along the Phylogenetic Tree of Eukaryotes after the Acquirement of Mitochondria

Jinya Otsuka · Annual Research & Review in Biology · 2024

According to the phylogeny of organisms reconstructed by the analyses on nucleotide base changes, the eukaryotes acquired the mitochondria first show the divergence of unicellular ones, then the divergence of fungi and sea algae occurs, and finally the animals and land plants app...

Open access Research Article 10.9734/arrb/2024/v39i112160

The Evolutionary Theory along the Phylogenetic Tree of Unicellular Organisms

Jinya Otsuka · Annual Research & Review in Biology · 2023

In parallel to the advancement of molecular biology suggesting the evolutionary route from the RNA world to the DNA-RNA-protein world through the RNA-protein world, the analysis on the nucleotide base changes in ribosomal RNA genes revels that the divergence of prokaryote and euk...

Open access Research Article 10.9734/arrb/2023/v38i930605