| Group of factors | Animal | Detected antigen | Method | Stage of embryogenesis | Reference |
| RNAP II | Mouse, rabbit | core of the RPB1 RNAPIIa, RNAPIIo | IF*, WB | 1-cell–16–32 cell | [23] | Mouse | RNAPIIa, RNAPIIo | IF, IEM | 1-cell-2-cell | [24–27] |
| mRNA transcription factors | Mouse | TBP | IF | 1-cell | [28] | Sp1, TBP | IF Microinjection of Sp1-dependent luciferase reporter gene | 1-cell-2-cell | [29] | TBP, TAF1 | IF | 1-cell | [30] | TBP, TBP2 | IF, WB | 1-cell-2-cell | [31] | TFIID | IF | 1-cell-2-cell | [24] |
| Splicing factors | Mouse | U1, U2, U4, U6 snRNAs snRNPs | ISH IF | 1-cell-blastocyst | [32] | U1 snRNA U1 snRNP | ISH IF | 1-cell-blastocyst | [33] | U1, U2 snRNAs snRNPs, SC35 | ISH IF | 1-cell–8-cell | [34] | snRNPs, SC35 | IF, IEM | 1 cell-2-cell | [24, 35, 36] | snRNPs | IF | 1-cell-2-cell | [27] | snRNPs | IEM | 2-cell | [37] | hnRNPs, snRNPs | IEM | 1-cell–8-cell | [38] | Bovine | U2 snRNA snRNPs | ISH, NB IF | 1-cell-blastocyst | [39] | snRNPs, SC35 | IEM | 1-cell–16-cell | [40, 41] | Caprine | snRNPs, SC35 | IEM | 1-cell-2-cell | [41] | Porcine | snRNPs | IF | 1-cell-blastocyst | [42] | snRNPs, SC35 | IEM | 1-cell–4-cell | [43] | Hamster | U1, U2 snRNAs snRNPs SC35 | ISH IF IF, IEM | 1-cell–8-cell | [44] |
| mRNA export-related factors | Mouse | hnRNPs | IF, WB | 1-cell–8-cell 1-cell | [34] [28] | hnRNPs, Y14, Aly/REF, NXF1/TAP | IF, IEM | 1-cell-2-cell | [45, 46] | Hamster | hnRNPs | IF | 1-cell–8-cell | [44] |
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