This family consists of several eukaryotic splicing factor 3B subunit 10 (SF3b10) proteins. SF3b10 is a 10 kDa subunit of the splicing factor SF3b. SF3b associates with the splicing factor SF3a and a 12S RNA unit to form the U2 small nuclear ribonucleoproteins complex. SF3b10 and SF3b14b are also thought to facilitate the interaction of U2 with the branch site [1].

1: Characterization of novel SF3b and 17S U2 snRNP proteins, including a human Prp5p homologue and an SF3b DEAD-box protein. Will CL, Urlaub H, Achsel T, Gentzel M, Wilm M, Luhrmann R; EMBO J 2002;21:4978-4988. PMID:12234937