snRNA
U2_snRNA
SO:0000392
U2 is a small nuclear RNA (snRNA) component of the spliceosome (involved in pre-mRNA splicing). Complementary binding between U2 snRNA (in an area lying towards the 5' end but 3' to hairpin I) and the branchpoint sequence (BPS) of the intron results in the bulging out of an unpaired adenine, on the BPS, which initiates a nucleophilic attack at the intronic 5' splice site, thus starting the first of two transesterification reactions that mediate splicing.
U2 small nuclear RNA
U2 snRNA
http://en.wikipedia.org/wiki/U2_snRNA
sequence
small nuclear RNA U2
snRNA U2