Sachiko Fukada

TL;DR: The results suggest that the basic structural organization of P-450arom genes and the regulatory mechanisms of expression are well conserved throughout the vertebrates.

TL;DR: Immunoblotting with the anti‐PSTAIR antibody demonstrated that the fastest‐migrating form of p34cdc2 homologues becomes abundant, when oocytes mature or the cell enters M phase, and the possible significance of this observation is discussed.

TL;DR: These findings, together with those of the previous study showing that actinomycin D prevented gonadotropin‐induced aromatase activation by medaka ovarian follicles, suggest that aromat enzyme activity is regulated at the transcriptional level in medaka vitellogenic follicles.

TL;DR: Interestingly, the trout 3β‐HSD expressed in COS‐1 cells exhibited minimal ability to convert pregnenolone to progesterone, and dehydroepiandrosterone was a more favoral substrate of the trout3β‐ HSD than 17α‐hydroxypregnanolone.

TL;DR: It is demonstrated, for the first time in fish, that a Ca(2+)-independent and cyclic-nucleotide-independent histone H1 kinase activity oscillates according to the cell cycle of the oocyte, peaking at the first and the second meiotic metaphase with a transient drop between them.