Characterization of ncRNA genes. (A) Pol II-transcribed genes. USEs, TATA boxes, and IEs map upstream of the U1, U2, U4, and U5 snRNA gene 5′ ends, DEs map downstream from the gene 3′ ends. The USE, TATA box, IE, and DE consensus sequences and inter-element distances are shown. (B) Pol III-transcribed genes. USEs and TATA boxes map upstream of the U6 snRNA, SRP RNA, and telomerase RNA gene 5′ ends, polythymidine stretches map at the gene 3′ ends. The USE, TATA box, and polythymidine stretch consensus sequences and interelement distances are shown. (C) PM_01 sequences. USEs, TATA boxes, IEs, and DEs flank the six sequences PM_01. Identical positions between all sequences are shown by stars.
