<p>This entry represents rhoptry proteins, such as Rop2, Rop4, Rop5, Rop7 and Rop18, which are found in <taxon tax_id="5811">Toxoplasma gondii</taxon> (phylum Apicomplexa), an obligate intracellular parasite for which the discharge of apical organelles named rhoptries is a key event in host cell invasion [<cite idref="PUB00042688"/>]. Rop4 is thought to play a role in parasitophorous vacuole membrane function during the infection of host organisms [<cite idref="PUB00042689"/>]. Rop5 is secreted during invasion and associates with the parasitophorous vacuole membrane [<cite idref="PUB00042690"/>]. Rop18 is a rhoptry kinase that controls the intracellular proliferation of T. gondii [<cite idref="PUB00042691"/>].</p>