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Species Specificity of the Insect Prothoracicotropic Hormone (PITH): the Presence of Bombyx ‐and Samia ‐Specific PTTHs in the Brain of Bombyx mori
Author(s) -
ISHIZAKI HIRONORI,
MIZOGUCHI AKIRA,
FUJISHITA MARIKO,
SUZUKI ATSUSHI,
MORIYA IKUO,
O'OKA HISAYOSHI,
KATAOKA HIROSHI,
ISOGAI AKIRA,
NAGASAWA HIROMICHI,
TAMURA SABURO,
SUZUKI AKINORI
Publication year - 1983
Publication title -
development, growth and differentiation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.864
H-Index - 66
eISSN - 1440-169X
pISSN - 0012-1592
DOI - 10.1111/j.1440-169x.1983.00593.x
Subject(s) - bombyx mori , sephadex , bombyx , insect , biology , pupa , botany , biochemistry , larva , enzyme , gene
Crude extracts of Bombyx mori brains can provoke adult development when injected into brain‐removed dormant pupae of Bombyx mori and Samia Cynthia ricini. From this fact the prothoracicotropic hormone (PTTH) of Bombyx has long been thought to be species‐nonspecifically active on Samia. Chemical fractionation of Bombyx brain or head extracts by fractional precipitation with acetone, Sephadex G‐50 gel‐filtration, and DEAE‐Sepharose CL‐6B chromatography, however, separated the fractions which activated Bombyx brainless pupae from those which activated Samia. Those results reveal the existence of two species‐specific PTTHs.