Figure S1.

uAUGs Are Present in Viral mRNAs, Related to Figure 1

(A) Incorporation of host transcript sequences increases the diversity of putative alternative start codons. For each viral genome segment, the frequency and position of alternative start codons is shown relative to native start of the viral genes. For each reading frame, the frequency and location of the first in-frame stop codon are indicated.

(B) Percentages of cap-snatched sequences that contain AUG codons, as identified by CAGE. Data are shown relative to all the viral reads from the specified genome segments.