| PRP45 | S. cerevisiae | PRP19 related | FUN20 | 42.5 | 18 |
| CEF1 | S. cerevisiae | PRP19 complex | NTC85 | 67.7 | 16 |
| PRP19 | S. cerevisiae | PRP19 complex | PSO4 | 56.6 | 15 |
| PRP46 | S. cerevisiae | PRP19 complex | NTC50 | 50.7 | 14 |
| RDS3 | S. cerevisiae | 17S U2 snRNP | — | 12.3 | 13 |
| SNU114 | S. cerevisiae | U5 snRNP | GIN10 | 114.0 | 11 |
| ECM2 | S. cerevisiae | PRP19 related | SLT11 | 40.9 | 8 |
| PRP8 | S. cerevisiae | U5 snRNP | DBF3, DNA39, RNA8, SLT21, USA2 | 279.5 | 7 |
| CLF1 | S. cerevisiae | PRP19 related | NTC77, SYF3 | 82.4 | 7 |
| ISY1 | S. cerevisiae | PRP19 related | NTC30, UTR3 | 28.0 | 7 |
| YJU2 | S. cerevisiae | Recruited at Bact complex | CWC16 | 32.3 | 6 |
| SMB1 | S. cerevisiae | Sm | — | 22.4 | 6 |
| LEA1 | S. cerevisiae | 17S U2 snRNP | — | 27.2 | 5 |
| CWC15 | S. cerevisiae | PRP19 complex | — | 19.9 | 5 |
| SYF2 | S. cerevisiae | Recruited at C complex | NTC31 | 24.8 | 4 |
| NTC20 | S. cerevisiae | | — | 16.0 | 4 |
| SPP2 | S. cerevisiae | Recruited at Bact complex | — | 20.6 | 4 |
| CWC2 | S. cerevisiae | PRP19 related | NTC40 | 38.4 | 3 |
| SMD3 | S. cerevisiae | Sm | SLT16 | 11.2 | 3 |
| CWC21 | S. cerevisiae | | — | 15.8 | 3 |
| CWC25 | S. cerevisiae | Recruited at Bact complex | — | 20.4 | 3 |
| CWC24 | S. cerevisiae | Recruited at Bact complex | — | 29.7 | 2 |
| SMD2 | S. cerevisiae | Sm | — | 12.9 | 2 |
| SMD1 | S. cerevisiae | Sm | SPP92 | 16.3 | 2 |
| SLU7 | S. cerevisiae | Second step factors | SLT17 | 44.6 | 2 |
| BUD13 | S. cerevisiae | RES complex | CWC26 | 30.5 | 2 |
| CDC40 | S. cerevisiae | Second step factors | PRP17, SLT15, SLU4 | 52.0 | 1 |
| BUD31 | S. cerevisiae | PRP19 related | CWC14 | 18.4 | 1 |
| BRR2 | S. cerevisiae | U5 snRNP | PRP44, RSS1, SLT22, SNU246 | 246.2 | 1 |
| SYF1 | S. cerevisiae | PRP19 related | NTC90 | 100.2 | 1 |
| SMX3 | S. cerevisiae | Sm | — | 9.7 | 1 |
| IST3 | S. cerevisiae | RES complex | SNU17 | 17.1 | 1 |
| MSL1 | S. cerevisiae | 17S U2 snRNP | YIB9 | 12.8 | 1 |
