Esterase A₄ Elevation Mechanism in Relation to Bombyx(Lepidoptera : Bombycidae) Egg Diapause Development

抄録

The esterase A₄ (Ease A₄) has been obtained from Shi 108 Bombyx diapause eggs using isoelectric focusing. In the chilling of eggs to terminate diapause, this Ease A₄ activity increased characteristically with steep rise at the completion of the diapause development. But no increase of amino acid incorporation into this Ease A₄ was observed in the experiment of ¹⁴C-leucine injection into eggs and pupae. The low temperature causes a latent enzyme to be set in motion as a signal for the completion of the diapause development.