SH3 domain-binding protein SNP70 splicing factor, PQBP1 and PP1 interacting VCTRL WW domain-binding protein 11 Npw38-binding protein NpwBP SIPP1 VCTERL CFAP90 BUG13 splicing factor that interacts with PQBP-1 and PP1 protein phosphatase 1, regulatory subunit 165 PPP1R165 WBP-11 FAP90 NPWBP