Consensus sequences and weight
matrices for major groups of splice site pairs. Frequency matrices
have only been calculated for major splice site groups (GT–AG
and GC–AG). In the first row we indicated positions with
respect to the splice cut point, which is always between –1
and 1. It should be taken into account that negative numbers in
donor matrices correspond to exonic regions, but in acceptor matrices
positive numbers correspond to exonic regions. In consensus sequences | means
cut position (M: A or C, R: A or G, Y: C or T, S: C or G).