10 20 30 40 50 60 70
UAUUAAUGUCCGAAUCU- -| U UU GUUGGGGAUCAGGAUUA
GG CUAUGCUG GG GAGGUAGUAAGUUGUGUGUU U
CC GAUGUGAC CCUUCCGUCAUUCAACAUACAA U
GUGGUGGUACUACAAGUC G^ U - U UAGAGGACUUGCCCCAC
. 130 120 110 100 90 80
Deep sequencing
Comment
Although there is a templated T at the 3' end of the 3p arm, the post-transcriptional addition of a terminal 3' U is supported by the conservation of Let7-P2 processing.