| P2X purinoceptor 4 | P2rx4 | D3YYR5 | 4 |
| Paired amphipathic helix protein Sin3a (Histone deacetylase complex subunit Sin3a) (Transcriptional corepressor Sin3a) | Sin3a Kiaa4126 | Q60520 | 4 |
| Papilin | Papln | Q9EPX2 | 4 |
| Pard3 protein (Partitioning defective 3 homolog) | Pard3 | B7ZNY3 | 4 |
| PC4 and SFRS1-interacting protein (Lens epithelium-derived growth factor) (mLEDGF) | Psip1 Ledgf | Q99JF8 | 4 |
| PDZ domain-containing protein GIPC2 (SemaF cytoplasmic domain-associated protein 2) (SEMCAP-2) | Gipc2 Semcap2 | Q9Z2H7 | 4 |
| Pecanex-like protein 3 (Pecanex homolog protein 3) | Pcnx3 Pcnxl3 | Q8VI59 | 4 |
| Peptidyl-prolyl cis-trans isomerase FKBP2 (PPIase FKBP2) (EC 5.2.1.8) (13 kDa FK506-binding protein) (13 kDa FKBP) (FKBP-13) (FK506-binding protein 2) (FKBP-2) (Immunophilin FKBP13) (Rotamase) | Fkbp2 Fkbp13 | P45878 | 4 |
| Peptidyl-prolyl cis-trans isomerase FKBP5 (PPIase FKBP5) (EC 5.2.1.8) (51 kDa FK506-binding protein) (51 kDa FKBP) (FKBP-51) (FK506-binding protein 5) (FKBP-5) (Rotamase) | Fkbp5 Fkbp51 | Q64378 | 4 |
| Peptidyl-prolyl cis-trans isomerase-like 2 (PPIase) (EC 2.3.2.27) (EC 5.2.1.8) (CYC4) (Cyclophilin-60) (Cyclophilin-like protein Cyp-60) (RING-type E3 ubiquitin transferase isomerase-like 2) (Rotamase PPIL2) | Ppil2 | Q9D787 | 4 |
| Periodic tryptophan protein 1 homolog | Pwp1 | Q99LL5 | 4 |
| Periodic tryptophan protein 2 homolog | Pwp2 Pwp2h | Q8BU03 | 4 |
| Peripherin (Peripherin 1, isoform CRA_b) | Prph Prph1 mCG_18385 | G3X981 | 4 |
| Peroxiredoxin-5, mitochondrial | Prdx5 | H3BJQ7 | 4 |
| Peroxisomal acyl-coenzyme A oxidase 1 (AOX) (EC 1.3.3.6) (Palmitoyl-CoA oxidase) | Acox1 Acox Paox | Q9R0H0 | 4 |
| Peroxisomal membrane protein PEX14 (PTS1 receptor-docking protein) (Peroxin-14) (Peroxisomal membrane anchor protein PEX14) | Pex14 | Q9R0A0 | 4 |
| PEST proteolytic signal-containing nuclear protein (PCNP) (PEST-containing nuclear protein) | Pcnp | Q6P8I4 | 4 |
| Phenylalanine--tRNA ligase alpha subunit | Farsa | E9PWY9 | 4 |
| Phosphatidylinositol 4-kinase alpha | Pi4ka | A0A140T8I9 | 4 |
| Phosphatidylinositol 4-phosphate 5-kinase type-1 alpha | Pip5k1a | F8WI18 | 4 |
| Phosphatidylinositol 4-phosphate 5-kinase type-1 gamma (PIP5K1-gamma) (PtdIns(4)P-5-kinase 1 gamma) (EC 2.7.1.68) (Phosphatidylinositol 4-phosphate 5-kinase type I gamma) (PIP5KIgamma) | Pip5k1c Kiaa0589 | O70161 | 4 |
| Phosphatidylinositol-glycan-specific phospholipase D (PI-G PLD) (EC 3.1.4.50) (Glycoprotein phospholipase D) (Glycosyl-phosphatidylinositol-specific phospholipase D) (GPI-PLD) (GPI-specific phospholipase D) | Gpld1 | O70362 | 4 |
| Phospholipase D1 (Phospholipase D1, isoform CRA_b) | Pld1 mCG_20179 | Q6NVF2 | 4 |
| Phospholipid-transporting ATPase (EC 3.6.3.1) | Atp11a | E9Q3G7 | 4 |
| Phospholipid-transporting ATPase (EC 3.6.3.1) | Atp11c | E9QKK8 | 4 |
| Phospholipid-transporting ATPase (EC 3.6.3.1) | Atp9a | Q8C4G3 | 4 |
| Phospholipid-transporting ATPase 11C (EC 3.6.3.1) (ATPase class VI type 11C) (P4-ATPase flippase complex alpha subunit ATP11C) | Atp11c | Q9QZW0 | 4 |
| Phospholipid-transporting ATPase IA (EC 3.6.3.1) (ATPase class I type 8A member 1) (Chromaffin granule ATPase II) (P4-ATPase flippase complex alpha subunit ATP8A1) | Atp8a1 Atpc1 | P70704 | 4 |
| Phosphoribosyl pyrophosphate synthase-associated protein 1 (PRPP synthase-associated protein 1) (39 kDa phosphoribosypyrophosphate synthase-associated protein) (PAP39) | Prpsap1 | Q9D0M1 | 4 |
| Phostensin (Protein phosphatase 1 F-actin cytoskeleton-targeting subunit) (Protein phosphatase 1 regulatory subunit 18) | Ppp1r18 | Q8BQ30 | 4 |
| Piezo-type mechanosensitive ion channel component | Piezo1 Fam38a | E9PUQ9 | 4 |
| PIH1 domain-containing protein 1 (Nucleolar protein 17 homolog) | Pih1d1 Nop17 | Q9CQJ2 | 4 |
| Placenta-specific gene 8 protein (Onzin) (Protein C15) | Plac8 | Q9JI48 | 4 |
| Plasma alpha-L-fucosidase (EC 3.2.1.51) (Alpha-L-fucoside fucohydrolase 2) (Alpha-L-fucosidase 2) | Fuca2 | Q99KR8 | 4 |
| Platelet-activating factor acetylhydrolase IB subunit gamma (EC 3.1.1.47) (PAF acetylhydrolase 29 kDa subunit) (PAF-AH 29 kDa subunit) (PAF-AH subunit gamma) (PAFAH subunit gamma) | Pafah1b3 Pafahg | Q61205 | 4 |
| Platelet-derived growth factor receptor alpha (PDGF-R-alpha) (PDGFR-alpha) (EC 2.7.10.1) (Alpha platelet-derived growth factor receptor) (Alpha-type platelet-derived growth factor receptor) (CD140 antigen-like family member A) (Platelet-derived growth factor alpha receptor) (CD antigen CD140a) | Pdgfra | P26618 | 4 |
| Pleckstrin homology domain-containing family H member 3 (PH domain-containing family H member 3) | Plekhh3 | Q8VCE9 | 4 |
| Pleckstrin homology-like domain family B member 1 | Phldb1 | E9PWB1 | 4 |
| Pleckstrin homology-like domain family B member 2 (Protein LL5-beta) | Phldb2 Ll5b | Q8K1N2 | 4 |
| Pleiotropic regulator 1 | Plrg1 | Q922V4 | 4 |
| PML-RARA-regulated adapter molecule 1 (PRAM-1) | Pram1 | Q6BCL1 | 4 |
| Poly [ADP-ribose] polymerase 9 (PARP-9) (EC 2.4.2.30) (ADP-ribosyltransferase diphtheria toxin-like 9) (ARTD9) (B aggressive lymphoma protein homolog) | Parp9 Bal | Q8CAS9 | 4 |
| Poly(rC)-binding protein 4 (Alpha-CP4) | Pcbp4 | P57724 | 4 |
| Polyadenylate-binding protein (PABP) | Pabpc6 Pabpc3 | Q9D4E6 | 4 |
| Polyadenylate-binding protein 2 (PABP-2) (Poly(A)-binding protein 2) (Nuclear poly(A)-binding protein 1) (Poly(A)-binding protein II) (PABII) (Polyadenylate-binding nuclear protein 1) | Pabpn1 Pab2 Pabp2 | Q8CCS6 | 4 |
| Polypeptide N-acetylgalactosaminyltransferase 1 (EC 2.4.1.41) (Polypeptide GalNAc transferase 1) (GalNAc-T1) (pp-GaNTase 1) (Protein-UDP acetylgalactosaminyltransferase 1) (UDP-GalNAc:polypeptide N-acetylgalactosaminyltransferase 1) [Cleaved into: Polypeptide N-acetylgalactosaminyltransferase 1 soluble form] | Galnt1 | O08912 | 4 |
| Polyphosphoinositide phosphatase (EC 3.1.3.-) (Phosphatidylinositol 3,5-bisphosphate 5-phosphatase) (SAC domain-containing protein 3) | Fig4 Kiaa0274 Sac3 | Q91WF7 | 4 |
| Polyribonucleotide nucleotidyltransferase 1, mitochondrial (EC 2.7.7.8) (3'-5' RNA exonuclease OLD35) (PNPase old-35) (Polynucleotide phosphorylase 1) (PNPase 1) (Polynucleotide phosphorylase-like protein) | Pnpt1 Pnpase | Q8K1R3 | 4 |
| Potassium channel tetramerisation domain containing 12b (Potassium channel tetramerisation domain containing 12b, isoform CRA_a) (Potassium channel tetramerisation domain-containing 12b) (Putative uncharacterized protein) | Kctd12b mCG_61677 | Q8C7J6 | 4 |
| Ppfia1 protein (Protein tyrosine phosphatase, receptor type, f polypeptide (PTPRF),-interacting protein (liprin), alpha 1) | Ppfia1 | B2RXW8 | 4 |
| PRA1 family protein 2 | Praf2 DXImx39e | Q9JIG8 | 4 |
| pre-mRNA 3' end processing protein WDR33 (WD repeat-containing protein 33) (WD repeat-containing protein WDC146) | Wdr33 Wdc146 | Q8K4P0 | 4 |
| Pre-mRNA 3'-end-processing factor FIP1 (FIP1-like 1 protein) | Fip1l1 | Q9D824 | 4 |
| Pre-mRNA-splicing factor 38A | Prpf38a | Q4FK66 | 4 |
| Pre-mRNA-splicing factor 38B | Prpf38b | Q80SY5 | 4 |
| Pre-mRNA-splicing factor SPF27 (Breast carcinoma-amplified sequence 2 homolog) (DNA amplified in mammary carcinoma 1 protein) | Bcas2 Dam1 | Q9D287 | 4 |
| pre-rRNA processing protein FTSJ3 (EC 2.1.1.-) (2'-O-ribose RNA methyltransferase SPB1 homolog) (Protein ftsJ homolog 3) (Putative rRNA methyltransferase 3) | Ftsj3 | Q9DBE9 | 4 |
| Predicted gene 5093 | Gm5093 | E9PZB3 | 4 |
| Prickle-like protein 1 | Prickle1 | Q3U5C7 | 4 |
| Probable 28S rRNA (cytosine-C(5))-methyltransferase (EC 2.1.1.-) (NOL1/NOP2/Sun domain family member 5) (Williams-Beuren syndrome chromosomal region 20A protein homolog) | Nsun5 Wbscr20 Wbscr20a | Q8K4F6 | 4 |
| Probable ATP-dependent RNA helicase DDX49 (EC 3.6.4.13) (DEAD box protein 49) | Ddx49 | Q4FZF3 | 4 |
| Probable ATP-dependent RNA helicase YTHDC2 (EC 3.6.4.13) | Ythdc2 | B2RR83 | 4 |
| Probable RNA-binding protein 19 (RNA-binding motif protein 19) | Rbm19 | Q8R3C6 | 4 |
| Proline/serine-rich coiled-coil protein 1 | Psrc1 Dda3 | Q9D0P7 | 4 |
| Prosaposin receptor GPR37 (G-protein coupled receptor 37) | Gpr37 | Q9QY42 | 4 |
| Prostaglandin reductase 1 (PRG-1) (EC 1.3.1.-) (15-oxoprostaglandin 13-reductase) (EC 1.3.1.48) (NADP-dependent leukotriene B4 12-hydroxydehydrogenase) (EC 1.3.1.74) | Ptgr1 Ltb4dh | Q91YR9 | 4 |
| Proteasomal ubiquitin receptor ADRM1 (110 kDa cell membrane glycoprotein) (Gp110) (Adhesion-regulating molecule 1) (ARM-1) (Rpn13 homolog) | Adrm1 Gp110 | Q9JKV1 | 4 |
| Proteasome assembly chaperone 2 (CD40 ligand-activated specific transcript 3) (Tumor necrosis factor superfamily member 5-induced protein 1) | Psmg2 Clast3 Tnfsf5ip1 | Q9EST4 | 4 |
| Proteasome assembly chaperone 3 (PAC-3) (mPAC3) | Psmg3 Pac3 | Q9CZH3 | 4 |
| Proteasome subunit alpha-type 7-like (EC 3.4.25.1) | Psma8 Psma7l | Q9CWH6 | 4 |
| Protein 4.1 | Epb41 Epb4.1 | A2A839 | 4 |
| Protein bicaudal D homolog 1 (Bic-D 1) | Bicd1 | Q8BR07 | 4 |
| Protein CMSS1 (Cms1 ribosomal small subunit homolog) | Cmss1 | Q9CZT6 | 4 |
| Protein DDI1 homolog 2 | Ddi2 | A2ADY9 | 4 |
| Protein disulfide-isomerase TMX3 (EC 5.3.4.1) (Thioredoxin domain-containing protein 10) (Thioredoxin-related transmembrane protein 3) | Tmx3 Kiaa1830 Txndc10 | Q8BXZ1 | 4 |
| Protein enabled homolog (NPC-derived proline-rich protein 1) (NDPP-1) | Enah Mena Ndpp1 | Q03173 | 4 |
| Protein FAM45A | Fam45a | Q9D8N2 | 4 |
| Protein FRG1 (FSHD region gene 1 protein) | Frg1 | P97376 | 4 |
| Protein Mdm4 (Double minute 4 protein) (Mdm2-like p53-binding protein) (Protein Mdmx) (p53-binding protein Mdm4) | Mdm4 Mdmx | O35618 | 4 |
| Protein NDRG3 (N-myc downstream-regulated gene 3 protein) (Protein Ndr3) | Ndrg3 Ndr3 | Q9QYF9 | 4 |
| Protein NipSnap homolog 2 (NipSnap2) (Glioblastoma-amplified sequence) | Gbas Nipsnap2 | O55126 | 4 |
| Protein O-GlcNAcase (OGA) (EC 3.2.1.169) (Beta-N-acetylhexosaminidase) (Beta-hexosaminidase) (Bifunctional protein NCOAT) (Meningioma-expressed antigen 5) (N-acetyl-beta-D-glucosaminidase) (EC 3.2.1.52) (N-acetyl-beta-glucosaminidase) | Mgea5 Hexc Kiaa0679 | Q9EQQ9 | 4 |
| Protein pelota homolog (EC 3.1.-.-) | Pelo | Q80X73 | 4 |
| Protein phosphatase 1 regulatory subunit 12C (Protein phosphatase 1 myosin-binding subunit of 85 kDa) (Protein phosphatase 1 myosin-binding subunit p85) | Ppp1r12c Mbs85 | Q3UMT1 | 4 |
| Protein phosphatase 1B (EC 3.1.3.16) (Protein phosphatase 2C isoform beta) (PP2C-beta) | Ppm1b Pp2c2 Pppm1b | P36993 | 4 |
| Protein phosphatase 2, regulatory subunit B (B56), delta isoform, isoform CRA_a (Protein phosphatase 2A B56 delta subunit) | Ppp2r5d mCG_2696 | Q7TNL5 | 4 |
| Protein PRRC2A | Prrc2a | G3UX48 | 4 |
| Protein PRRC2C | Prrc2c | S4R294 | 4 |
| Protein PRRC2C (BAT2 domain-containing protein 1) (HLA-B-associated transcript 2-like 2) (Proline-rich and coiled-coil-containing protein 2C) | Prrc2c Bat2d Bat2d1 Bat2l2 Kiaa1096 | Q3TLH4 | 4 |
| Protein quaking (MqkI) (qkI) | Qki Qk Qk1 Qka1 | Q9QYS9 | 4 |
| Protein regulator of cytokinesis 1 | Prc1 | Q99K43 | 4 |
| Protein regulator of cytokinesis 1 (Protein regulator of cytokinesis 1, isoform CRA_b) | Prc1 mCG_19465 | G3UY19 | 4 |
| Protein RRP5 homolog (Apoptosis-linked gene 4 protein) (Programmed cell death protein 11) | Pdcd11 Alg4 Kiaa0185 | Q6NS46 | 4 |
| Protein SDA1 homolog (SDA1 domain-containing protein 1) | Sdad1 | Q80UZ2 | 4 |
| Protein sel-1 homolog 1 (Suppressor of lin-12-like protein 1) (Sel-1L) | Sel1l Sel1h | Q9Z2G6 | 4 |
| Protein sprouty homolog 2 (Spry-2) | Spry2 | Q9QXV8 | 4 |
| Protein TANC1 | Tanc1 | E9QAF9 | 4 |
| Protein transport protein Sec24A (SEC24-related protein A) | Sec24a | Q3U2P1 | 4 |
| Protein unc-93 homolog B1 (Unc-93B1) | Unc93b1 Unc93b | Q8VCW4 | 4 |
| Protein Z-dependent protease inhibitor (PZ-dependent protease inhibitor) (PZI) (Serpin A10) | Serpina10 Zpi | Q8R121 | 4 |