RPLP2 and infection: The F-type T4ASS also codes for pili but was missing from genomes Lp2, Lp3, Lp6 and L. cherii while the Lvh (Legionella virB homologue) T4ASS, which is involved in spread of infection from environmental niches8, 28, was identified in only 10 Legionella genomes: 6 genomes from Clade 1; and 2 from Clade 3 (L. bozemanii serogroup 2 and L. dumoffii) (Table 1).