...a direct role for the spliceosome in the maturation of TER1. The authors noticed that the longer precursor transcripts contain an intron with putative splice sites and a branch point sequence.
Figure 1: In vitro selection with U1 snRNP. Figure 2: Site-specific crosslinking of commitment complex proteins to the 5′-splice-site region in the presence and absence of pre-mRNA/U1snRNA base ...