Tail virion protein 7P is a viral transmembrane protein that interacts with the packaging signal of the viral genome leading to the initiation the virion concomitant assembly-budding process in the host inner membrane.

1: Nucleotide sequence determination, characterization and purification of the single-stranded DNA-binding protein and major coat protein of filamentous phage phi Lf of Xanthomonas campestris pv. campestris. Wen FS, Tseng YH; J Gen Virol. 1994;75:15-22. PMID:8113723