Major envelope protein that plays a role in the biogenesis of the viral double membrane and in egress of virus from the host cell (PubMed:8999886, PubMed:17475658, PubMed:27466413). Produces the wrapped form of virus that is required for cell-to-cell spread (PubMed:27466413, PubMed:29540596). Acts as a lipase with broad specificity including phospholipase C, phospholipase A, and triacylglycerol lipase activities (PubMed:9405398). Interacts with protein B5. Component of the inner side of the enveloped virion (EV) membrane. F13 is associated post-translationally with membranes. Late-budding domains (L domains) are short sequence motifs essential for viral particle budding. They recruit proteins of the host ESCRT machinery (Endosomal Sorting Complex Required for Transport) or ESCRT-associated proteins. F13 contains one L domain: a YPPL motif, which might interact with PDCD6IP/AIP1. Palmitoylated. Attachment of the palmitate moiety is essential for correct intracellular targeting and protein function.