Gene Group : U4-U6-U5 SMALL NUCLEAR RIBONUCLEOPROTEIN PARTICLE
U4/U6.U5 tri-snRNP is assembled from U5 and U4/U6 snRNPs. The complex contains U4 and U6 snRNAs base-paired with each other and U6 snRNA. This complex is recruited to the pre-catalytic splicing intermediate, complex B. (Adapted from PMID:21441581).