PPIB and infection: However, CD8+ T cells presented high positivity for Peanut agglutinin (PNA), which binds to terminal β-gal residues (Sharma et al., 1998), suggesting that Tc-iTS might bind to host sialyl-glycoconjugates, thereby inhibiting a natural re-sialylation event that takes place during the acute phase of infection (Freire-de-Lima et al., 2010).