Abstract: The integral tegumental membrane proteins have been obtained from the crude tegument membrane preparation by the extraction and removal of the water soluble proteins and other peripheral protein components with sodium lauryl sulphate. Five' membrane proteins were identified by SDS-PAGE electrophoresis with the following molecular weight: Ⅰ. 64,000; Ⅱ. 58,000; Ⅲ. 39,000; Ⅳ. 27,000 and Ⅴ. 18,700. The membrane proteins of Ⅰ, Ⅲ and Ⅳ are glycoproteins. Among these membrane proteins two components can be recognized by specific antibodies, based upon the isolation of 125I labelled immune complexes with Staphylococcus Protein A, SDS-PAGE electrophoresis and autoradiography.