| PRPF8 | H. sapiens | U5 snRNP | HPRP8, PRP8, PRPC8, RP13 | 273.6 | 193 |
| AQR | H. sapiens | PRP19 related | DKFZp686B23123, IBP160, KIAA0560, fSAP164 | 171.3 | 158 |
| EFTUD2 | H. sapiens | U5 snRNP | DKFZp686E24196, FLJ44695, KIAA0031, MFDM, Snrp116 | 109.4 | 108 |
| CDC5L | H. sapiens | PRP19 complex | CDC5, CDC5-LIKE, CEF1, KIAA0432, PCDC5RP | 92.3 | 107 |
| CRNKL1 | H. sapiens | PRP19 related | CLF, CRN, Clf1, HCRN, MSTP021 | 100.5 | 102 |
| PRPF19 | H. sapiens | PRP19 complex | NMP200, PRP19, PSO4, SNEV, UBOX4 | 55.2 | 80 |
| XAB2 | H. sapiens | PRP19 related | DKFZp762C1015, HCNP, HCRN, NTC90, SYF1 | 100.0 | 77 |
| SRRM2 | H. sapiens | SR related | 300-KD, CWF21, Cwc21, DKFZp667L0421, DKFZp686O15166 | 299.6 | 76 |
| CWC22 | H. sapiens | Recruited at Bact complex | EIF4GL, KIAA1604, NCM, fSAPb | 105.5 | 68 |
| SNRNP200 | H. sapiens | U5 snRNP | ASCC3L1, BRR2, FLJ11521, HELIC2, RP33 | 244.5 | 66 |
| CDC40 | H. sapiens | Second step factors | EHB3, FLJ10564, MGC102802, PRP17, PRPF17 | 65.5 | 53 |
| SNW1 | H. sapiens | PRP19 related | Bx42, MGC119379, NCOA-62, PRPF45, Prp45 | 61.5 | 49 |
| SNRPB | H. sapiens | Sm | COD, SNRPB1, Sm-B/B', SmB/B', SmB/SmB' | 24.6 | 42 |
| NCBP1 | H. sapiens | pre-mRNA/mRNA binding proteins | CBP80, MGC2087, NCBP, Sto1 | 91.8 | 37 |
| PLRG1 | H. sapiens | PRP19 complex | Cwc1, MGC110980, PRL1, PRP46, PRPF46 | 57.2 | 32 |
| BCAS2 | H. sapiens | PRP19 complex | DAM1, SPF27, Snt309 | 26.1 | 27 |
| SNRPD2 | H. sapiens | Sm | SMD2, SNRPD1, Sm-D2 | 13.5 | 27 |
| SNRPA1 | H. sapiens | 17S U2 snRNP | Lea1 | 28.4 | 26 |
| HNRNPC | H. sapiens | hnRNP | C1, C2, HNRNP, HNRPC, MGC104306 | 33.7 | 26 |
| BUD31 | H. sapiens | PRP19 related | Cwc14, EDG-2, EDG2, G10, MGC111202 | 17.0 | 20 |
| SNRPD3 | H. sapiens | Sm | SMD3, Sm-D3 | 13.9 | 19 |
| PPIL1 | H. sapiens | PRP19 related | CGI-124, CYPL1, MGC678, PPIase, hCyPX | 18.2 | 16 |
| EIF4A3 | H. sapiens | EJC/mRNP | DDX48, DKFZp686O16189, KIAA0111, MGC10862, NMP265 | 46.9 | 16 |
| SNRNP40 | H. sapiens | U5 snRNP | 40K, FLJ41108, HPRP8BP, MGC1910, PRP8BP | 39.3 | 15 |
| PPIE | H. sapiens | PRP19 related | CYP-33, CYP33, MGC111222, MGC3736 | 33.4 | 15 |
| BUD13 | H. sapiens | RES complex | Cwc26, FLJ27090, MGC13125, fSAP71 | 70.5 | 14 |
| ISY1 | H. sapiens | PRP19 related | FSAP33, KIAA1160 | 33.0 | 13 |
| CWC15 | H. sapiens | PRP19 complex | C11orf5, Cwf15, HSPC148, ORF5, AD-002 | 26.6 | 10 |
| DHX8 | H. sapiens | Second step factors | DDX8, HRH1, PRP22, PRPF22 | 139.3 | 9 |
| SF3B3 | H. sapiens | 17S U2 snRNP | KIAA0017, RSE1, SAP130, SF3b130, STAF130 | 135.6 | 8 |
| SNRPG | H. sapiens | Sm | MGC117317, SMG, Sm-G | 8.5 | 8 |
| NCBP2 | H. sapiens | pre-mRNA/mRNA binding proteins | CBC2, CBP20, NIP1, PIG55 | 18.0 | 7 |
| DCD | H. sapiens | common MS contaminants | AIDD, DCD-1, DSEP, HCAP, MGC71930 | 11.3 | 6 |
| SF3B1 | H. sapiens | 17S U2 snRNP | Hsh155, MDS, PRP10, PRPF10, SAP155 | 145.8 | 6 |
| RALY | H. sapiens | hnRNP | HNRPCL2, MGC117312, P542 | 32.5 | 6 |
| SF3B2 | H. sapiens | 17S U2 snRNP | Cus1, SAP145, SF3B145, SF3b1, SF3b150 | 100.2 | 6 |
| SF3A1 | H. sapiens | 17S U2 snRNP | PRP21, PRPF21, SAP114, SF3A120 | 88.9 | 6 |
| SNRPF | H. sapiens | Sm | SMF, Sm-F, snRNP-F | 9.7 | 6 |
| SNRPB2 | H. sapiens | 17S U2 snRNP | MGC24807, MGC45309, Msl1 | 25.5 | 6 |
| HSPB1 | H. sapiens | chaperonin/heat shock | CMT2F, DKFZp586P1322, HMN2B, HS.76067, HSP27 | 22.8 | 5 |
| DHX35 | H. sapiens | Recruited at C complex | C20orf15, DDX35, FLJ22759, KAIA0875 | 78.9 | 4 |
| SNRPD1 | H. sapiens | Sm | HsT2456, SMD1, SNRPD, Sm-D1 | 13.3 | 4 |
| MAGOH | H. sapiens | EJC/mRNP | MAGOH1, MAGOHA | 17.2 | 4 |
| SF3B6 | H. sapiens | 17S U2 snRNP | SF3B14, CGI-110, HSPC175, Ht006, P14, SAP14 | 14.6 | 3 |
| SRRT | H. sapiens | pre-mRNA/mRNA binding proteins | ARS2, ASR2, MGC126427, serrate | 100.7 | 3 |
| THRAP3 | H. sapiens | Recruited at A complex | FLJ22082, MGC133082, MGC133083, TRAP150 | 108.7 | 3 |
| PDCD6 | H. sapiens | | ALG-2, FLJ42309, FLJ46208, MGC111017, MGC119050 | 21.9 | 2 |
| BAG2 | H. sapiens | | BAG-2, KIAA0576, MGC149462, dJ417I1.2 | 23.8 | 2 |
| HSPA2 | H. sapiens | chaperonin/heat shock | HSP70-2, HSP70-3 | 70.0 | 2 |
| RBM8A | H. sapiens | EJC/mRNP | BOV-1A, BOV-1B, BOV-1C, C1DELq21.1, DEL1q21.1 | 19.9 | 2 |
| PHF5A | H. sapiens | 17S U2 snRNP | INI, MGC1346, Rds3, SAP14b, SF3b14b | 12.4 | 1 |
| SF3B5 | H. sapiens | 17S U2 snRNP | MGC3133, SF3b10, Ysf3 | 10.1 | 1 |
| SYF2 | H. sapiens | Recruited at C complex | CBPIN, DKFZp564O2082, NTC31, P29, fSAP29 | 28.7 | 1 |
| SF3A3 | H. sapiens | 17S U2 snRNP | PRP9, PRPF9, SAP61, SF3a60 | 58.8 | 1 |
| DHX38 | H. sapiens | Second step factors | DDX38, KIAA0224, PRP16, PRPF16 | 140.5 | 1 |
| HNRNPK | H. sapiens | hnRNP | CSBP, FLJ41122, HNRPK, TUNP | 51.0 | 1 |
