Coordinate induction of electrophoretic variants of juvenile hormone esterase.
Major and minor electrophoretic variants of juvenile hormone esterase (JHE) were found in the hemolymph of last instar larvae of Trichoplusia ni, both before and after metamorphic commitment. The average ratios of activity of the two major forms were similar during both last stadium peaks in activity. Immunological analysis showed that the hemolymph concentration of JHE during this stadium paralleled the level of enzymatic activity, and no putative higher molecular weight, inactive forms were detected. Immunological analysis provided the first evidence of relatedness of major and minor forms. After hormonal stimulation, the concentration of the two major forms increased concomitantly and by a similar proportion, suggesting that charge variation, at least for these two major forms, is not a point of hormonal or developmental regulation of JHE.
Department of Entomology, University of Kentucky, Lexington 40546.
G
G
Jones
M
M
Manczak
D000818:Animals; D015153:Blotting, Western; D002265:Carboxylic Ester Hydrolases / Q000096:biosynthesis*; D004790:Enzyme Induction; D006458:Hemolymph / Q000201:enzymology; D007526:Isoelectric Point; D007527:Isoenzymes / Q000378:metabolism; D007605:Juvenile Hormones / Q000378:metabolism*; D007814:Larva; D007915:Lepidoptera / Q000201:enzymology*; D008970:Molecular Weight; D009036:Moths / Q000201:enzymology* / Q000254:growth & development
D007527:Isoenzymes; D007605:Juvenile Hormones; D002265:Carboxylic Ester Hydrolases; C038003:juvenile hormone esterase