Fig. 2

Transcription factor activities following IAV and NDV infections. The number of up-regulated genes was determined by comparing expression at each time-point post-infection with pre-infection levels (upper bar plots). Up-regulated TFs are indicated by the white portion of each bar. BETA was then used to quantify TF activity (lower heatmap) in NDV and IAV infections based on gene sets defined by TRANSFAC matrices (rows). Coloring indicates weak (yellow) to strong (blue) TF activity