Abstract
A method is presented for the rapid extraction of proteins from Drosophila tissues. This method involves lysis of embryos in high concentrations of guanidine hydrochloride, followed by ultracentrifugation in a guanidine hydrochloride step gradient. Several membrane-associated antigens, including Notch and the β subunit of PS integrin are enriched in this preparation. The quantity of the proteoglycan, DROP-1, obtained from Drosophila eggs and testes was also greatly improved by the guanidine hydrochloride extraction method. This method should prove useful in the isolation and characterization of many Drosophila antigens, particularly those associated with cell membranes.
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