Prothoracicotropic hormone is released five times in the 5th-larval instar of the silkworm, Bombyx mori

1993 ◽  
Vol 39 (1) ◽  
pp. 83-88 ◽  
Author(s):  
Yasuhito Shirai ◽  
Yasuo Aizono ◽  
Teruo Iwasaki ◽  
Akira Yanagida ◽  
Hajime Mori ◽  
...  
Keyword(s):  
Bombyx Mori ◽  
Larval Instar ◽  
Prothoracicotropic Hormone ◽  
Silkworm Bombyx Mori

In vitro action of prothoracicotropic hormone on RNA-synthesis in the prothoracic gland of the silkworm, Bombyx mori

1986 ◽  
Vol 32 (8) ◽  
pp. 711-717 ◽  
Author(s):  
Yasuo Aizono ◽  
Noboru Matsuo ◽  
Yoshihiro Yoshida ◽  
Gunki Funatsu ◽  
Masaru Funatsu ◽  
...  
Keyword(s):  
Bombyx Mori ◽  
Rna Synthesis ◽  
Prothoracic Gland ◽  
Prothoracicotropic Hormone ◽  
Silkworm Bombyx Mori

scholarly journals STUDIES ON THE POSTERIOR SILK GLAND OF THE SILKWORM, BOMBYX MORI

1968 ◽  
Vol 38 (3) ◽  
pp. 574-588 ◽  
Author(s):  
Yutaka Tashiro ◽  
Takashi Morimoto ◽  
Shiro Matsuura ◽  
Sunao Nagata
Keyword(s):  
Bombyx Mori ◽  
Early Stage ◽  
Larval Instar ◽  
Silk Gland ◽  
Exponential Increase ◽  
Wet Weight ◽  
Rough Er ◽  
Electron Microscopical ◽  
Silkworm Bombyx Mori ◽  
Posterior Silk Gland

Growth of the posterior silk gland and biosynthesis of fibroin during the fifth larval instar of the silkworm, Bombyx mori, have been studied. In accordance with the exponential increase in the wet weight of the gland, the amounts of DNA, RNA, protein, and lipids per animal increased rapidly in the early stage of the fifth instar (0–96 hr). Biosynthesis of fibroin, on the contrary, mainly proceeds in the later stage of the fifth instar (120–192 hr). Electron microscopical observations have shown that, in the very early stage (0–12 hr), a number of free ribosomes exist in the cytoplasm. Rough endoplasmic reticulum (ER) with closely spaced cisternae was also observed. Then rough ER starts to proliferate rapidly, and at the same time lamellar ER is rapidly or gradually transformed into vesicular or tubular forms. In the later stage of the fifth instar (120–192 hr), the cytoplasm is mostly filled with tubular or vesicular ER. Golgi vacuoles, free vacuoles (fibroin globules), and mitochondria are also observed. It is concluded that in the early stage of the fifth instar the cellular structures necessary for the biosynthesis of fibroin are rapidly formed, while in the later stage the biosynthesis of fibroin proceeds at a maximum rate and utilizes these structures.

scholarly journals Isolation and characterization of prothoracicotropic hormone from silkworm, Bombyx mori.

1982 ◽  
Vol 46 (4) ◽  
pp. 1107-1109 ◽  
Author(s):  
Akinori SUZUKI ◽  
Hiromichi NAGASAWA ◽  
Hiroshi KATAOKA ◽  
Yasuhiro HORI ◽  
Akira ISOGAI ◽  
...  
Keyword(s):  
Bombyx Mori ◽  
Prothoracicotropic Hormone ◽  
Isolation And Characterization ◽  
Silkworm Bombyx Mori

Prothoracicotropic Hormone of the Silkworm,Bombyx mori: Amino Acid Sequence and Dimeric Structure

1991 ◽  
Vol 55 (1) ◽  
pp. 73-86 ◽  
Author(s):  
Hiroshi Kataoka ◽  
Hiromichi Nagasawa ◽  
Akira Isogai ◽  
Hironori Ishizaki ◽  
Akinori Suzuki
Keyword(s):  
Amino Acid ◽  
Amino Acid Sequence ◽  
Bombyx Mori ◽  
Prothoracicotropic Hormone ◽  
Dimeric Structure ◽  
Silkworm Bombyx Mori

Assignment of Disulfide Bond Location in Prothoracicotropic Hormone of the Silkworm, Bombyx mori: A Homodimeric Peptide

Biochemistry ◽  
1994 ◽  
Vol 33 (19) ◽  
pp. 5912-5919 ◽  
Author(s):  
Jun Ishibashi ◽  
Hiroshi Kataoka ◽  
Akira Isogai ◽  
Atsushi Kawakami ◽  
Hironao Saegusa ◽  
...  
Keyword(s):  
Bombyx Mori ◽  
Disulfide Bond ◽  
Prothoracicotropic Hormone ◽  
Silkworm Bombyx Mori
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