| Probable tRNA N6-adenosine threonylcarbamoyltransferase | Osgep | E0CXW7 | 1 |
| Probable tRNA N6-adenosine threonylcarbamoyltransferase | Osgep | E9QMF4 | 1 |
| Probable U3 small nucleolar RNA-associated protein 11 (U3 snoRNA-associated protein 11) (UTP11-like protein) | Utp11 Utp11l | Q9CZJ1 | 1 |
| Probable Xaa-Pro aminopeptidase 3 (X-Pro aminopeptidase 3) (EC 3.4.11.9) (Aminopeptidase P3) (APP3) | Xpnpep3 | B7ZMP1 | 1 |
| Processing of 1, ribonuclease P/MRP family, (S. cerevisiae) (Processing of precursor 1, ribonuclease P/MRP family, (S. cerevisiae)) | Pop1 | Q8K205 | 1 |
| Procollagen C-endopeptidase enhancer 1 | Pcolce | D3YUE2 | 1 |
| Procollagen-lysine,2-oxoglutarate 5-dioxygenase 2 | Plod2 | E9Q718 | 1 |
| Procollagen-proline, 2-oxoglutarate 4-dioxygenase (Proline 4-hydroxylase), alpha II polypeptide, isoform CRA_f (Prolyl 4-hydroxylase subunit alpha-2) | P4ha2 mCG_13782 | Q5SX75 | 1 |
| Proenkephalin-A [Cleaved into: Synenkephalin; Met-enkephalin (Opioid growth factor) (OGF); PENK(114-133); PENK(143-184); Met-enkephalin-Arg-Ser-Leu; Leu-enkephalin; PENK(238-259); Met-enkephalin-Arg-Phe] | Penk Penk1 | P22005 | 1 |
| Profilin | Pfn1 | Q3U7V7 | 1 |
| Profilin | Pfn1 | Q5SX49 | 1 |
| Programmed cell death protein 10 (Fragment) | Pdcd10 | E0CY82 | 1 |
| Programmed cell death protein 2-like (Fragment) | Pdcd2l | F6SGV3 | 1 |
| Programmed cell death protein 5 | Pdcd5 | D3Z7Q5 | 1 |
| Prohibitin (Fragment) | Phb | Q5SQG5 | 1 |
| Prokineticin receptor 1 (PK-R1) (G-protein coupled receptor 73) | Prokr1 Gpr73 Pkr1 | Q9JKL1 | 1 |
| Prolactin regulatory element binding, isoform CRA_b (Prolactin regulatory element-binding protein) | Preb mCG_23495 | D3Z3S1 | 1 |
| Prolactin regulatory element-binding protein (Mammalian guanine nucleotide exchange factor mSec12) | Preb Sec12 | Q9WUQ2 | 1 |
| Prolactin-2C2 (Mitogen-regulated protein 1) (Proliferin-1) | Prl2c2 Mrp1 Plf Plf1 | P04095 | 1 |
| Proliferation marker protein Ki-67 (Antigen identified by monoclonal antibody Ki-67 homolog) (Antigen KI-67 homolog) (Antigen Ki67 homolog) | Mki67 | Q61769 | 1 |
| Proliferation marker protein Ki-67 (Antigen identified by monoclonal antibody Ki-67 homolog) (Antigen KI-67 homolog) (Antigen Ki67 homolog) | Mki67 | E9PVX6 | 1 |
| Proliferation-associated protein 2G4 (Fragment) | Pa2g4 | D3YVH7 | 1 |
| Proline dehydrogenase 1, mitochondrial (EC 1.5.5.2) (Proline oxidase) | Prodh Pro1 | Q9WU79 | 1 |
| Proline rich 19 (Proline-rich 19) | Prr19 | B2RW88 | 1 |
| Proline-rich AKT1 substrate 1 | Akt1s1 | E9QKI4 | 1 |
| Proline-rich AKT1 substrate 1 | Akt1s1 | E9QKI5 | 1 |
| Proline-rich AKT1 substrate 1 (Proline-rich AKT substrate) | Akt1s1 Pras | Q9D1F4 | 1 |
| Proline-rich transmembrane protein 1 | Prrt1 mCG_134610 RP23-24A13.1-001 | A2CG20 | 1 |
| Proline-rich transmembrane protein 2 (Dispanin subfamily B member 3) (DSPB3) | Prrt2 | E9PUL5 | 1 |
| Proline-rich transmembrane protein 3 | Prrt3 | Q6PE13 | 1 |
| Proline-serine-threonine phosphatase-interacting protein 2 (PEST phosphatase-interacting protein 2) (Macrophage actin-associated tyrosine-phosphorylated protein) (pp37) | Pstpip2 Mayp | Q99M15 | 1 |
| Prolyl 3-hydroxylase 1 | P3h1 | A2A7Q5 | 1 |
| Prolyl 3-hydroxylase 1 | P3h1 | A6PW84 | 1 |
| Prolyl 4-hydroxylase subunit alpha-1 | P4ha1 | E9Q7B0 | 1 |
| Prolyl 4-hydroxylase subunit alpha-2 (Fragment) | P4ha2 | B0QZH3 | 1 |
| Prominin-2 (PROM-2) (Prominin-like protein 2) (mPROML2) | Prom2 Proml2 | Q3UUY6 | 1 |
| Propionyl-CoA carboxylase beta chain, mitochondrial | Pccb | E9Q1J7 | 1 |
| Proprotein convertase subtilisin/kexin type 5 (EC 3.4.21.-) (Proprotein convertase 5) (PC5) (Proprotein convertase 6) (PC6) (Subtilisin-like proprotein convertase 6) (SPC6) (Subtilisin/kexin-like protease PC5) | Pcsk5 | Q04592 | 1 |
| Prosalusin (Fragment) | Tor2a | H3BK73 | 1 |
| Prosaposin | Psap | K3W4L3 | 1 |
| Prosaposin (Prosaposin, isoform CRA_a) (Psap protein) (Putative uncharacterized protein) | Psap mCG_61290 | Q8BFQ1 | 1 |
| Prospero homeobox protein 1 (Homeobox prospero-like protein PROX1) (PROX-1) | Prox1 | P48437 | 1 |
| Prostacyclin receptor (Prostaglandin I2 receptor) (PGI receptor) (PGI2 receptor) (Prostanoid IP receptor) | Ptgir | P43252 | 1 |
| Prostaglandin reductase 2 (PRG-2) (EC 1.3.1.48) (15-oxoprostaglandin 13-reductase) (Zinc-binding alcohol dehydrogenase domain-containing protein 1) | Ptgr2 Zadh1 | Q8VDQ1 | 1 |
| Prostaglandin reductase 2 (Putative uncharacterized protein) | Ptgr2 Zadh1 | Q3TXN1 | 1 |
| Proteasome activator complex subunit 1 | Psme1 | G3UXY0 | 1 |
| Proteasome activator complex subunit 1 (Fragment) | Psme1 | G3UXZ5 | 1 |
| Proteasome activator complex subunit 1 (Fragment) | Psme1 | G3UWN9 | 1 |
| Proteasome activator complex subunit 3 (Fragment) | Psme3 | A2A4J1 | 1 |
| Proteasome assembly chaperone 1 | Psmg1 | D3Z795 | 1 |
| Proteasome endopeptidase complex (EC 3.4.25.1) | Psma7 | Q3THL2 | 1 |
| Proteasome endopeptidase complex (EC 3.4.25.1) | Psma6 | E0CXB1 | 1 |
| Proteasome endopeptidase complex (EC 3.4.25.1) | Psma3 | E0CX62 | 1 |
| Proteasome inhibitor PI31 subunit | Psmf1 | Q8BHL8 | 1 |
| Proteasome maturation protein (Proteassemblin) (Protein UMP1 homolog) (mUMP1) | Pomp | Q9CQT5 | 1 |
| Proteasome subunit alpha type (EC 3.4.25.1) (Fragment) | Psma4 | E9PW69 | 1 |
| Proteasome subunit beta type-11 (EC 3.4.25.1) (Proteasome subunit beta-5t) | Psmb11 | Q8BG41 | 1 |
| Protein 4.1 | Epb41 Epb4.1 | A2A841 | 1 |
| Protein 4.1 | Epb41 Epb4.1 | A2A842 | 1 |
| Protein 4.1 (Fragment) | Epb41 Epb4.1 | A2A838 | 1 |
| Protein ABHD16A (EC 3.-.-.-) (Alpha/beta hydrolase domain-containing protein 16A) (Abhydrolase domain-containing protein 16A) (HLA-B-associated transcript 5) | Abhd16a Bat5 Ng26 | Q9Z1Q2 | 1 |
| Protein ABHD8 (EC 3.-.-.-) (Alpha/beta hydrolase domain-containing protein 8) (Abhydrolase domain-containing protein 8) | Abhd8 | Q8R0P8 | 1 |
| Protein ALEX (Alternative gene product encoded by XL-exon) | Gnas Gnas1 | Q6R0H6 | 1 |
| Protein angel homolog 2 | Angel2 D1Ertd396e D1Ertd654e MNCb-4273 | Q8K1C0 | 1 |
| Protein arginine N-methyltransferase 5 (EC 2.1.1.-) | Prmt5 | A0A0R4J049 | 1 |
| Protein arginine N-methyltransferase 9 (Protein arginine N-methyltransferase 10) (EC 2.1.1.320) | Prmt9 Prmt10 | Q3U3W5 | 1 |
| Protein bassoon | Bsn Kiaa0434 | O88737 | 1 |
| Protein bicaudal D homolog 1 | Bicd1 | B2KG46 | 1 |
| Protein bicaudal D homolog 1 | Bicd1 | G3UXK5 | 1 |
| Protein C12orf4 homolog | D6Wsu163e | Q91YN0 | 1 |
| Protein canopy homolog 3 (Protein associated with Tlr4) (Trinucleotide repeat-containing gene 5 protein) | Cnpy3 Prat4a Tnrc5 | Q9DAU1 | 1 |
| Protein canopy homolog 4 (Fragment) | Cnpy4 | D3Z0T5 | 1 |
| Protein canopy homolog 4 (Protein associated with Tlr4) | Cnpy4 Prat4b | Q8BQ47 | 1 |
| Protein CASC4 | Casc4 | E9PZJ6 | 1 |
| Protein CASC4 (Cancer susceptibility candidate gene 4 protein homolog) | Casc4 | Q6P2L7 | 1 |
| Protein CASP | Cux1 Cutl1 | P70403 | 1 |
| Protein CASP | Cux1 | H3BJ26 | 1 |
| Protein CASP | Cux1 | H3BJN3 | 1 |
| Protein CASP | Cux1 | H3BKT0 | 1 |
| Protein CDV3 | Cdv3 | A0A087WNP6 | 1 |
| Protein cereblon (Protein PiL) | Crbn | Q8C7D2 | 1 |
| Protein CREG1 | Creg1 | J3QP41 | 1 |
| Protein CTLA-2-alpha (Cytotoxic T-lymphocyte-associated protein 2-alpha) | Ctla2a | P12399 | 1 |
| Protein CutA (Putative uncharacterized protein) | Cuta | D5MCW4 | 1 |
| Protein DBF4 homolog A (MuDBF4) | Dbf4 Dbf4a | Q9QZ41 | 1 |
| Protein diaphanous homolog 1 | Diaph1 | D3Z074 | 1 |
| Protein diaphanous homolog 1 | Diaph1 | E9PXV7 | 1 |
| Protein diaphanous homolog 3 (Diaphanous-related formin-3) (DRF3) (p134mDIA2) (mDIA2) | Diaph3 Diap3 | Q9Z207 | 1 |
| Protein dispatched homolog 1 (Mdispa) | Disp1 Disp Dispa Icb Icbins | Q3TDN0 | 1 |
| Protein dopey-2 | Dopey2 Kiaa0933 | Q3UHQ6 | 1 |
| Protein enabled homolog | Enah | E9QKQ9 | 1 |
| Protein enabled homolog | Enah | E9QKR1 | 1 |
| Protein enabled homolog | Enah | J3QNM3 | 1 |
| Protein eva-1 homolog A (Protein FAM176A) (Transmembrane protein 166) | Eva1a Fam176a Tmem166 | Q91WM6 | 1 |
| Protein FAM111A | Fam111a | D3YYD2 | 1 |
| Protein FAM134A | Fam134a | Q6NS82 | 1 |
| Protein FAM136A | Fam136a | Q9CR98 | 1 |
| Protein FAM160B1 | Fam160b1 Kiaa1600 | Q8CDM8 | 1 |
| Protein FAM171B | Fam171b | Q14CH0 | 1 |
| Protein FAM173A | Fam173a | Q501J2 | 1 |