^am1, m2, rnl modules 1 and 2; [U]n, uridine-homopolymer of length n; m1.[U]n, module 1 with 3′-terminal U tract; m1.[U]n.m2, LSU-rRNA; [U]n.m2, module 2 with 5'-terminal U tract; and ∼, exact module terminus not determined. n.d., not identified; /, not observed.

^bPeak positions of tract length distribution is taken from Supplementary Figure S2. Libraries F2, PA and GG display similar U-tract length as F1 shown here.

^cFour clones (dp11056, dp11060, dp11084, dp11088).

^dThis type of transcript could not be identified unambiguously.

^eSeven clones (dp9540, dp10594, dp11008, dp11009, dp11012, dp11017, dp11064).

^fNot-quality clipped individual reads from the F1 library.