The steady state K7 mRNA levels were maximal at 2 h post-infection (p.i.)and thereafter declined, but remained detectable until 12 h p.i. The presence of cytosine arabinoside (AraC), an inhibitor of DNA replication, or cycloheximide (CHX), an inhibitor of protein synthesis, enhanced the level of K7 mRNA at 6 h p.i. compared with untreated cells. Here, KRT7 is linked to infection.