EIF2AK2 and infection: Results presented in Fig. 1C show that, in line to what had been observed with the eIF2α polypeptide, the presence of P-PKR, already detectable in samples harvested at 8 h.p.i., reaches a maximum intensity level from 16 to 32 h.p.i. As expected, no significant variations were observed in the total content of PKR throughout the duration of the infection.