FIG. 7.

Comparison of the poly(A) signals of RTBV and CaMV. The sequences of the terminal redundancies of RTBV and CaMV are shown. The region is delimited by the transcription start site (black dot) and the poly(A) site (bold type UA). NUEs are set in bold type, and FUEs are underlined, with a dashed underline indicating sequences with only a slight effect on processing efficiency. Perfect and one-base mismatches of UUUGUA are indicated with black and white arrows, respectively. (Adapted from reference 35.)