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Molecular characteristics of p9. Primary amino acid sequence of the p9 protein is shown. Predicted phosphorylation sites, positions of positively and negatively charged side chains, sites for covalent attachment of ubiquitin (Ub) as well as the known binding domain for ALIX and AP-2 are indicated. Sequence positions of the synthetic peptides sp9 1-51, sp91-21, and sp922-51 are shown at the bottom of the figure.
