NHLH2 and infection: Seventy-two hours after infection, co-expression of HA-LMO3 and FLAG-HEN2 led to a significant induction of Mash1. The induction of Mash1 was also observed in SK-N-BE cells transfected with expression vector HA-LMO3 alone or HA-LMO3 and FLAG-HEN2 at 72 h after transfection (Figure S1C).