| PRPF8 | H. sapiens | U5 snRNP | HPRP8, PRP8, PRPC8, RP13 | 273.6 | 77 |
| SNRNP200 | H. sapiens | U5 snRNP | ASCC3L1, BRR2, FLJ11521, HELIC2, RP33 | 244.5 | 56 |
| PRPF19 | H. sapiens | PRP19 complex | NMP200, PRP19, PSO4, SNEV, UBOX4 | 55.2 | 26 |
| SRRM2 | H. sapiens | SR related | 300-KD, CWF21, Cwc21, DKFZp667L0421, DKFZp686O15166 | 299.6 | 16 |
| SFPQ | H. sapiens | linked to splicing | DKFZp547C228, DKFZp667K0521, DKFZp686K1282, POMP100, PSF | 76.1 | 13 |
| EFTUD2 | H. sapiens | U5 snRNP | DKFZp686E24196, FLJ44695, KIAA0031, MFDM, Snrp116 | 109.4 | 13 |
| BCAS2 | H. sapiens | PRP19 complex | DAM1, SPF27, Snt309 | 26.1 | 9 |
| SNRPA1 | H. sapiens | 17S U2 snRNP | Lea1 | 28.4 | 7 |
| SNW1 | H. sapiens | PRP19 related | Bx42, MGC119379, NCOA-62, PRPF45, Prp45 | 61.5 | 7 |
| CDC5L | H. sapiens | PRP19 complex | CDC5, CDC5-LIKE, CEF1, KIAA0432, PCDC5RP | 92.3 | 7 |
| DHX8 | H. sapiens | Second step factors | DDX8, HRH1, PRP22, PRPF22 | 139.3 | 6 |
| CRNKL1 | H. sapiens | PRP19 related | CLF, CRN, Clf1, HCRN, MSTP021 | 100.5 | 6 |
| AQR | H. sapiens | PRP19 related | DKFZp686B23123, IBP160, KIAA0560, fSAP164 | 171.3 | 5 |
| HNRNPC | H. sapiens | hnRNP | C1, C2, HNRNP, HNRPC, MGC104306 | 33.7 | 4 |
| SNRPB2 | H. sapiens | 17S U2 snRNP | MGC24807, MGC45309, Msl1 | 25.5 | 4 |
| SF3B3 | H. sapiens | 17S U2 snRNP | KIAA0017, RSE1, SAP130, SF3b130, STAF130 | 135.6 | 4 |
| SNRPD1 | H. sapiens | Sm | HsT2456, SMD1, SNRPD, Sm-D1 | 13.3 | 3 |
| SNRPD2 | H. sapiens | Sm | SMD2, SNRPD1, Sm-D2 | 13.5 | 3 |
| SNRPD3 | H. sapiens | Sm | SMD3, Sm-D3 | 13.9 | 3 |
| CWC22 | H. sapiens | Recruited at Bact complex | EIF4GL, KIAA1604, NCM, fSAPb | 105.5 | 3 |
| CDC40 | H. sapiens | Second step factors | EHB3, FLJ10564, MGC102802, PRP17, PRPF17 | 65.5 | 2 |
| SLU7 | H. sapiens | Second step factors | 9G8, MGC9280, hSlu7 | 68.4 | 2 |
| SNRPB | H. sapiens | Sm | COD, SNRPB1, Sm-B/B', SmB/B', SmB/SmB' | 24.6 | 2 |
| EIF4A3 | H. sapiens | EJC/mRNP | DDX48, DKFZp686O16189, KIAA0111, MGC10862, NMP265 | 46.9 | 2 |
| SNRPF | H. sapiens | Sm | SMF, Sm-F, snRNP-F | 9.7 | 2 |
| EEF1A1 | H. sapiens | translation-related | CCS-3, CCS3, EE1A1, EEF-1, EEF1A | 50.1 | 2 |
| SF3A1 | H. sapiens | 17S U2 snRNP | PRP21, PRPF21, SAP114, SF3A120 | 88.9 | 2 |
| PPWD1 | H. sapiens | Recruited at C complex | FLJ33156, FLJ36356, KIAA0073 | 73.6 | 2 |
| SNRNP40 | H. sapiens | U5 snRNP | 40K, FLJ41108, HPRP8BP, MGC1910, PRP8BP | 39.3 | 2 |
| XAB2 | H. sapiens | PRP19 related | DKFZp762C1015, HCNP, HCRN, NTC90, SYF1 | 100.0 | 2 |
| DDX41 | H. sapiens | Recruited at C complex | ABS, MGC8828 | 69.8 | 2 |
| PLRG1 | H. sapiens | PRP19 complex | Cwc1, MGC110980, PRL1, PRP46, PRPF46 | 57.2 | 1 |
| SYF2 | H. sapiens | Recruited at C complex | CBPIN, DKFZp564O2082, NTC31, P29, fSAP29 | 28.7 | 1 |
| SNRPE | H. sapiens | Sm | B-raf, SME, Sm-E | 10.8 | 1 |
| ERH | H. sapiens | misc. proteins found irregularly with spliceosomes | DROER, FLJ27340 | 12.3 | 1 |
| PABPN1 | H. sapiens | pre-mRNA/mRNA binding proteins | OPMD, PAB2, PABII, PABP-2, PABP2 | 32.7 | 1 |
| PPIL3 | H. sapiens | Recruited at C complex | CYPJ | 18.2 | 1 |
| PRKRIP1 | H. sapiens | | C114, FLJ13902, FLJ40957, KRBOX3 | 21.0 | 1 |
