FIG. 2.

PpLSU3 RNA is cleaved at two IPSs in yeast. (A) The 5′ ends of the 3′ half PpLSU3 RNA species in yeast were mapped by primer extension. Note that the sequence from the primer extension reads the complementary strand to the RNA. (B) Schematic drawing of part of the PpLSU3 secondary structure showing the two IPSs as mapped in panel A. Exon sequences are in lowercase, and intron sequences are in uppercase. The 5′ splice site is indicated (5′SS).