| Nomenclature | PAR1 | PAR2 | PAR3 | PAR4 |
| HGNC, UniProt | F2R, P25116 | F2RL1, P55085 | F2RL2, O00254 | F2RL3, Q96RI0 |
| Principal transduction | Gq/11/Gi/o/G12/13 | Gq/11/Gi/o | Not known | Gq/11/Gi/o |
| Agonist proteases | thrombin (F2, P00734), activated protein C (PROC, P04070), matrix metalloproteinase 1 (MMP1, P45452), matrix metalloproteinase 13 (MMP13, P45452) 1569 | Trypsin, tryptase, TF/VIIa, Xa | thrombin (F2, P00734) | thrombin (F2, P00734), trypsin, cathepsin G (CTSG, P08311) |
| Selective agonists (pKi) | TFLLR-NH2 (pEC50 5.41) 1573 | SLIGKV-NH2 1579, SLIGRL-NH2 1579, 2-furoyl-LIGRLO-amide (5.4) 1580, GB 110 (pEC50 6.55) 1570, | – | AYPGKF-NH2, GYPGKF-NH2, GYPGQV-NH2 |
| Selective antagonists (pKi) | SCH530348 (8.09) 1572, atopaxar (pIC50 7.72) 1578, RWJ-56110 (pIC50 6.36) 1568 | P2pal18s 1582, GB88 (pIC50 5.7) 1583 | – | – |
| Radioligands (Kd) | [3H]haTRAP (Agonist) (1.5x10-8 M) 1566 | 2-furoyl-LIGRL[N[3H]propionyl]-O-NH2 1575, [3H]2-furoyl-LIGRL-NH2 (Agonist) 1576, trans-cinnamoyl-LIGRLO [N-[3H]propionyl]-NH2 1567 | – | – |
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