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Component of the escrt-ii complex, which is required for multivesicular bodies (mvbs) formation and sorting of endosomal cargo proteins into mvbs. the mvb pathway mediates delivery of transmembrane proteins into the lumen of the lysosome for degradation. the escrt-ii complex is probably involved in the recruitment of the escrt-iii complex. its ability to bind ubiquitin probably plays a role in endosomal sorting of ubiquitinated cargo proteins by escrt complexes. the escrt-ii complex may also play a role in transcription regulation, possibly via its interaction with ell.
