To rule out TRIMCypA or a CypA-containing protein as a potential factor responsible for the early post-entry block in marmoset PBLs, we carried out the infection of PBLs from five common marmosets in the presence or absence of cyclosporine A (CsA), a drug that binds CypA and inhibits its binding to the HIV-1 capsid. Here, PPIA is linked to infection.