Toyokazu Shimotani

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The hagfish is considered the most primitive vertebrate known, living or extinct. It remains an enigma whether adenohypophysial hormones similar to those of more advanced vertebrates are present in(More)
Since hagfish are members of the most primitive group of living vertebrates, studies on their reproduction are indispensable for understanding phylogenetic aspects of vertebrate reproductive system.(More)
A single functional gonadotropin (GTH) comprising two subunits, α and β, was recently identified in the pituitary of brown hagfish (Paramyxine atami). Little is known about the feedback mechanisms(More)
Adrenocorticotropin (ACTH), melanotropins (MSHs), growth hormone (GH) and gonadotropin (GTH) have been identified or cloned from the pituitary gland of sea lampreys (Petromyzon marinus). The present(More)
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