Abstract: The invention relates to an in vitro method for diagnosing essential tremor wherein a mutation of dopamine D3 receptor gene or protein is sought. The invention further relates to the use of a ligand having anti-dopamine D3 receptor activity for treatment of essential tremor.

Abstract: Obtaining quail egg extracts.The ovomucoid fraction is obtained by the process consisting in:(1) adding trichloroacetic acid in solution in acetone to quail egg white;(2) separating the supernatent from the reaction medium;(3) adding acetone to the supernatent so obtained;(4) dissolving the precipitate obtained in step (3) in water and in dialyzing the solution obtained against water;(5) filtering the resulting solution through a membrane having a cut-off of about 10,000(6) then subjecting the filtered solution to molecular filtration and in recovering all the fractions having antitrypsin activity.Application in the treatment of allergic states.

Abstract: The invention concerns a ovomucoid fraction which has been isolated from quail eggs, particularly of the sub-species Coturnix coturnix, japonica, characterized by its beef antitrypsine activity (100 units of antitrypsin per mg) and by the fact that it consists primarily of a postalbumin and protein which corresponds to protein as evidenced by the proteinogram obtained by electrophoretitics on gelatinized starch.This ovomucoid fraction is a medication useful for the treatment of numerous allergies, and it acts not so much as an antihistamine but rather acts as modifying the surface.