| SF3B3 | H. sapiens | 17S U2 snRNP | KIAA0017, RSE1, SAP130, SF3b130, STAF130 | 135.6 | 30 |
| SF3A1 | H. sapiens | 17S U2 snRNP | PRP21, PRPF21, SAP114, SF3A120 | 88.9 | 24 |
| SF3B1 | H. sapiens | 17S U2 snRNP | Hsh155, MDS, PRP10, PRPF10, SAP155 | 145.8 | 22 |
| SF3B2 | H. sapiens | 17S U2 snRNP | Cus1, SAP145, SF3B145, SF3b1, SF3b150 | 100.2 | 20 |
| DDX46 | H. sapiens | 17S U2 snRNP associated | FLJ25329, KIAA0801, MGC9936, PRPF5, Prp5 | 117.4 | 20 |
| PUF60 | H. sapiens | 17S U2 snRNP associated | FIR, FLJ31379, RoBPI, SIAHBP1 | 59.9 | 19 |
| ACLY | H. sapiens | | ACL, ATPCL, CLATP | 120.8 | 18 |
| TUBB6 | H. sapiens | common MS contaminants | HsT1601, MGC132410, MGC4083, TUBB-5 | 49.9 | 18 |
| SRRT | H. sapiens | pre-mRNA/mRNA binding proteins | ARS2, ASR2, MGC126427, serrate | 100.7 | 17 |
| HNRNPA2B1 | H. sapiens | hnRNP | DKFZp779B0244, FLJ22720, HNRNPA2, HNRNPB1, HNRPA2 | 37.4 | 15 |
| RBM39 | H. sapiens | pre-mRNA/mRNA binding proteins | CAPER, CAPERalpha, DKFZp781C0423, FLJ44170, FSAP59 | 59.4 | 15 |
| DHX15 | H. sapiens | 17S U2 snRNP associated | DBP1, DDX15, HRH2, PRP43, PRPF43 | 90.9 | 13 |
| SNRNP70 | H. sapiens | U1 snRNP | RNPU1Z, RPU1, SNRP70, Snp1, U1-70K | 51.6 | 12 |
| DDX17 | H. sapiens | pre-mRNA/mRNA binding proteins | DKFZp761H2016, P72, RH70 | 80.3 | 11 |
| GAPDH | H. sapiens | | G3PD, GAPD, MGC88685 | 36.1 | 10 |
| SNRPB | H. sapiens | Sm | COD, SNRPB1, Sm-B/B', SmB/B', SmB/SmB' | 24.6 | 10 |
| SNRPD2 | H. sapiens | Sm | SMD2, SNRPD1, Sm-D2 | 13.5 | 9 |
| CCAR1 | H. sapiens | Recruited at A complex | MGC44628, RP11-437A18.1 | 132.8 | 9 |
| HNRNPA3 | H. sapiens | hnRNP | 2610510D13Rik, D10S102, FBRNP, HNRPA3, MGC138232 | 39.6 | 8 |
| HNRNPA1 | H. sapiens | hnRNP | HNRPA1, HNRPA1L3, MGC102835, hnRNP A1, hnRNP-A1 | 38.7 | 8 |
| HNRNPC | H. sapiens | hnRNP | C1, C2, HNRNP, HNRPC, MGC104306 | 33.7 | 8 |
| SNRPA1 | H. sapiens | 17S U2 snRNP | Lea1 | 28.4 | 8 |
| BUB3 | H. sapiens | | BUB3L, hBUB3 | 37.2 | 8 |
| SNRPD3 | H. sapiens | Sm | SMD3, Sm-D3 | 13.9 | 8 |
| SRSF11 | H. sapiens | SR protein | DKFZp686M13204, FLJ18226, NET2, SFRS11, dJ677H15.2 | 53.5 | 8 |
| ACTA2 | H. sapiens | | AAT6, ACTSA, MYMY5 | 42.0 | 8 |
| LUC7L3 | H. sapiens | | CRA, CREAP-1, CROP, LUC7A, OA48-18 | 51.5 | 8 |
| SF1 | H. sapiens | Recruited at A complex | BBP, D11S636, MBBP, ZFM1, ZNF162 | 68.3 | 8 |
| HNRNPK | H. sapiens | hnRNP | CSBP, FLJ41122, HNRPK, TUNP | 51.0 | 7 |
| RBMX | H. sapiens | hnRNP | HNRPG, RBMXP1, RBMXRT, RNMX, hnRNP-G | 42.3 | 7 |
| FUS | H. sapiens | hnRNP | ALS6, FUS1, HNRNPP2, POMP75, TLS | 53.4 | 7 |
| TUBA4A | H. sapiens | common MS contaminants | FLJ30169, H2-ALPHA, TUBA1 | 49.9 | 7 |
| U2AF2 | H. sapiens | 17S U2 snRNP associated | U2AF65 | 53.5 | 7 |
| RBM17 | H. sapiens | 17S U2 snRNP associated | DKFZp686F13131, MGC14439, SPF45 | 45.0 | 7 |
| PCNP | H. sapiens | | DKFZp781I24156 | 18.9 | 6 |
| SRSF1 | H. sapiens | SR protein | ASF, FLJ53078, MGC5228, SF2, SF2p33 | 27.7 | 6 |
| PCBP1 | H. sapiens | hnRNP | HNRPE1, HNRPX, hnRNP-E1, hnRNP-X | 37.5 | 5 |
| IGF2BP1 | H. sapiens | | CRD-BP, CRDBP, IMP-1, IMP1, VICKZ1 | 63.5 | 5 |
| HNRNPL | H. sapiens | hnRNP | FLJ35509, HNRPL, P/OKcl.14, hnRNP-L | 64.1 | 5 |
| RBM25 | H. sapiens | Recruited at A complex | MGC105088, MGC117168, NET52, RED120, RNPC7 | 100.2 | 5 |
| DNAJC8 | H. sapiens | chaperonin/heat shock | HSPC331, SPF31 | 29.8 | 5 |
| U2AF1 | H. sapiens | 17S U2 snRNP associated | DKFZp313J1712, FP793, RN, RNU2AF1, U2AF35 | 27.9 | 5 |
| CHERP | H. sapiens | 17S U2 snRNP associated | DAN16, SCAF6, SRA1 | 103.7 | 5 |
| SNRPE | H. sapiens | Sm | B-raf, SME, Sm-E | 10.8 | 5 |
| MAP1B | H. sapiens | | DKFZp686E1099, DKFZp686F1345, FLJ38954, FUTSCH, MAP5 | 270.6 | 5 |
| SNRPF | H. sapiens | Sm | SMF, Sm-F, snRNP-F | 9.7 | 5 |
| NCBP2 | H. sapiens | pre-mRNA/mRNA binding proteins | CBC2, CBP20, NIP1, PIG55 | 18.0 | 4 |
| SNRPA | H. sapiens | U1 snRNP | Mud1, U1-A, U1A | 31.3 | 4 |
| PTBP1 | H. sapiens | alternative splicing factor | HNRNP-I, HNRNPI, HNRPI, MGC10830, MGC8461 | 57.2 | 4 |
| HNRNPA0 | H. sapiens | hnRNP | HNRPA0 | 30.8 | 4 |
| ZNF207 | H. sapiens | other rna binding domain containing | DKFZp761N202 | 50.8 | 4 |
| PRPF40A | H. sapiens | Recruited at A complex | FBP-11, FBP11, FLAF1, FLJ20585, FNBP3 | 108.8 | 4 |
| LUC7L2 | H. sapiens | | CGI-59, CGI-74, FLJ10657, LUC7B2 | 46.5 | 4 |
| EIF4A2 | H. sapiens | translation-related | BM-010, DDX2B, EIF4A, EIF4F, eIF-4A-II | 46.4 | 4 |
| EEF1A1 | H. sapiens | translation-related | CCS-3, CCS3, EE1A1, EEF-1, EEF1A | 50.1 | 4 |
| U2SURP | H. sapiens | 17S U2 snRNP associated | KIAA0332, MGC133197, SR140, fSAPa | 118.3 | 4 |
| ARHGEF2 | H. sapiens | | DKFZp547L106, DKFZp547P1516, FLJ45440, GEF, GEF-H1 | 111.5 | 3 |
| EEF1A2 | H. sapiens | translation-related | EEF1AL, EF-1-alpha-2, EF1A, FLJ41696, HS1 | 50.5 | 3 |
| HSPB1 | H. sapiens | chaperonin/heat shock | CMT2F, DKFZp586P1322, HMN2B, HS.76067, HSP27 | 22.8 | 3 |
| HNRNPU | H. sapiens | hnRNP | HNRPU, SAF-A, U21.1, hnRNP U | 90.6 | 3 |
| HNRNPR | H. sapiens | hnRNP | FLJ25714, HNRPR, hnRNP R, hnRNP-R | 70.9 | 3 |
| HSPA8 | H. sapiens | PRP19 complex | HSC54, HSC70, HSC71, HSP71, HSP73 | 70.9 | 3 |
| SF3A2 | H. sapiens | 17S U2 snRNP | PRP11, PRPF11, SAP62, SF3a66 | 49.3 | 3 |
| DDX5 | H. sapiens | pre-mRNA/mRNA binding proteins | DKFZp434E109, DKFZp686J01190, G17P1, HLR1, HUMP68 | 69.1 | 3 |
| SRSF4 | H. sapiens | SR protein | SFRS4, SRP75 | 56.7 | 3 |
| HNRNPM | H. sapiens | hnRNP | CEAR, DKFZp547H118, HNRNPM4, HNRPM, HNRPM4 | 77.5 | 3 |
| SNRPD1 | H. sapiens | Sm | HsT2456, SMD1, SNRPD, Sm-D1 | 13.3 | 3 |
| EWSR1 | H. sapiens | pre-mRNA/mRNA binding proteins | EWS, bK984G1.4 | 68.5 | 3 |
| SF3B6 | H. sapiens | 17S U2 snRNP | SF3B14, CGI-110, HSPC175, Ht006, P14, SAP14 | 14.6 | 3 |
| MATR3 | H. sapiens | Occasionally detected in C complex | DKFZp686K0542, DKFZp686K23100, KIAA0723, MGC9105, MPD2 | 94.6 | 3 |
| HTATSF1 | H. sapiens | 17S U2 snRNP associated | TAT-SF1, dJ196E23.2 | 85.9 | 3 |
| SRSF2 | H. sapiens | SR protein | PR264, SC-35, SC35, SFRS2, SFRS2A | 25.5 | 3 |
| C19orf43 | H. sapiens | | MGC2803, fSAP18 | 18.4 | 3 |
| SRSF3 | H. sapiens | SR protein | SFRS3, SRp20 | 19.3 | 2 |
| NCBP1 | H. sapiens | pre-mRNA/mRNA binding proteins | CBP80, MGC2087, NCBP, Sto1 | 91.8 | 2 |
| ILF2 | H. sapiens | | MGC8391, NF45, PRO3063 | 43.1 | 2 |
| SUGP1 | H. sapiens | Recruited at A complex | DKFZp434E2216, F23858, RBP, SF4 | 72.5 | 2 |
| PTBP2 | H. sapiens | alternative splicing factor | FLJ34897, PTB, PTBLP, brPTB, nPTB | 57.5 | 2 |
| PCBP2 | H. sapiens | hnRNP | HNRPE2, MGC110998, hnRNP-E2 | 38.6 | 2 |
| SNRNP40 | H. sapiens | U5 snRNP | 40K, FLJ41108, HPRP8BP, MGC1910, PRP8BP | 39.3 | 2 |
| SNRPC | H. sapiens | U1 snRNP | FLJ20302, U1C, Yhc1 | 17.4 | 2 |
| SNRPB2 | H. sapiens | 17S U2 snRNP | MGC24807, MGC45309, Msl1 | 25.5 | 2 |
| YBX1 | H. sapiens | pre-mRNA/mRNA binding proteins | BP-8, CSDA2, CSDB, DBPB, MDR-NF1 | 35.9 | 2 |
| CCDC75 | H. sapiens | Occasionally detected in Bact complex | CENP-Y, CENPY, FLJ38348, GPATCH11 | 30.2 | 2 |
| CPSF7 | H. sapiens | CPSF | CFIm59, FLJ12529, FLJ39024, MGC9315 | 52.0 | 2 |
| TRRAP | H. sapiens | chromatin-related | FLJ10671, PAF350/400, PAF400, STAF40, TR-AP | 437.6 | 2 |
| EIF3E | H. sapiens | translation-related | EIF3-P48, EIF3S6, INT6, eIF3-p46 | 52.2 | 2 |
| FTSJD2 | H. sapiens | | FLJ22156, KIAA0082, MTr1, hMTr1 | 95.3 | 2 |
| PHF5A | H. sapiens | 17S U2 snRNP | INI, MGC1346, Rds3, SAP14b, SF3b14b | 12.4 | 2 |
| SF3B5 | H. sapiens | 17S U2 snRNP | MGC3133, SF3b10, Ysf3 | 10.1 | 2 |
| CPSF6 | H. sapiens | CPSF | CFIM, CFIM68, HPBRII-4, HPBRII-7 | 59.2 | 2 |
| SF3A3 | H. sapiens | 17S U2 snRNP | PRP9, PRPF9, SAP61, SF3a60 | 58.8 | 2 |
| HNRNPD | H. sapiens | hnRNP | AUF1, AUF1A, HNRPD, P37, hnRNPD0 | 38.4 | 2 |
| SFPQ | H. sapiens | linked to splicing | DKFZp547C228, DKFZp667K0521, DKFZp686K1282, POMP100, PSF | 76.1 | 2 |