Figure 1
From: POLYAR, a new computer program for prediction of poly(A) sites in human sequences
Schematic presentation of the search regions for PAS-, CS- and GU/U motifs, as well as for upstream (Up)/downstream (DN) pentamers used in the algorithm. a[-40:-1], for PAS-strong and PAS-weak poly(A) sites. b[+2:+50], for all three classes of poly(A) sites. c60 nt upstream of the PAS-motif's left boundary, for PAS-strong poly(A) sites. d[-60:-1], for PAS-weak and PAS-less poly(A) sites. e[+2:+60], for PAS-weak poly(A) sites. f[+2:+100], for PAS-less poly(A) sites.