| Serine palmitoyltransferase 1 (EC 2.3.1.50) (Long chain base biosynthesis protein 1) (LCB 1) (Serine-palmitoyl-CoA transferase 1) (SPT 1) (SPT1) | Sptlc1 Lcb1 | O35704 | 4 |
| Serine/arginine-rich splicing factor 3 (Pre-mRNA-splicing factor SRP20) (Protein X16) (Splicing factor, arginine/serine-rich 3) | Srsf3 Sfrs3 Srp20 X16 | P84104 | 4 |
| Serine/threonine-protein kinase 3 (EC 2.7.11.1) (Mammalian STE20-like protein kinase 2) (MST-2) (STE20-like kinase MST2) [Cleaved into: Serine/threonine-protein kinase 3 36kDa subunit (MST2/N); Serine/threonine-protein kinase 3 20kDa subunit (MST2/C)] | Stk3 Mess1 Mst2 | Q9JI10 | 4 |
| Serine/threonine-protein kinase 4 (EC 2.7.11.1) (Mammalian STE20-like protein kinase 1) (MST-1) (STE20-like kinase MST1) [Cleaved into: Serine/threonine-protein kinase 4 37kDa subunit (MST1/N); Serine/threonine-protein kinase 4 18kDa subunit (MST1/C)] | Stk4 Mst1 | Q9JI11 | 4 |
| Serine/threonine-protein kinase ICK (EC 2.7.11.22) (Intestinal cell kinase) (mICK) (MAK-related kinase) (MRK) | Ick | Q9JKV2 | 4 |
| Serine/threonine-protein kinase mTOR (EC 2.7.11.1) (FK506-binding protein 12-rapamycin complex-associated protein 1) (FKBP12-rapamycin complex-associated protein) (Mammalian target of rapamycin) (mTOR) (Mechanistic target of rapamycin) (Rapamycin target protein 1) (RAPT1) | Mtor Frap Frap1 | Q9JLN9 | 4 |
| Serine/threonine-protein kinase/endoribonuclease IRE1 (Endoplasmic reticulum-to-nucleus signaling 1) (Inositol-requiring protein 1) (Ire1-alpha) (IRE1a) [Includes: Serine/threonine-protein kinase (EC 2.7.11.1); Endoribonuclease (EC 3.1.26.-)] | Ern1 Ire1 | Q9EQY0 | 4 |
| Serine/threonine-protein phosphatase 2A 56 kDa regulatory subunit epsilon isoform (PP2A B subunit isoform B'-epsilon) (PP2A B subunit isoform B56-epsilon) (PP2A B subunit isoform PR61-epsilon) (PP2A B subunit isoform R5-epsilon) | Ppp2r5e Kiaa4006 | Q61151 | 4 |
| Serine/threonine-protein phosphatase 5 (PP5) (EC 3.1.3.16) (Protein phosphatase T) (PPT) | Ppp5c | Q60676 | 4 |
| Serine/threonine-protein phosphatase PP1-gamma catalytic subunit (PP-1G) (EC 3.1.3.16) (Protein phosphatase 1C catalytic subunit) | Ppp1cc | P63087 | 4 |
| SERTA domain-containing protein 2 (Transcriptional regulator interacting with the PHD-bromodomain 2) (TRIP-Br2) | Sertad2 Kiaa0127 MNCb-1504 | Q9JJG5 | 4 |
| Serum paraoxonase/arylesterase 2 (PON 2) (EC 3.1.1.2) (EC 3.1.1.81) (Aromatic esterase 2) (A-esterase 2) (Serum aryldialkylphosphatase 2) | Pon2 | Q62086 | 4 |
| Serum response factor (SRF) | Srf | Q9JM73 | 4 |
| SET domain-containing protein 4 (EC 2.1.1.-) | Setd4 ORF21 | P58467 | 4 |
| Short coiled-coil protein | Scoc Scoco | Q78YZ6 | 4 |
| Signal peptidase complex subunit 3 (Signal peptidase complex subunit 3 homolog (S. cerevisiae)) | Spcs3 | Q6ZWQ7 | 4 |
| Signal peptide peptidase-like 2A (SPP-like 2A) (SPPL2a) (EC 3.4.23.-) (Intramembrane protease 3) (IMP-3) (Presenilin-like protein 2) | Sppl2a Imp3 Psl2 MNCb-3763 | Q9JJF9 | 4 |
| Signal transducing adapter molecule 2 (STAM-2) (Hrs-binding protein) | Stam2 Hbp | O88811 | 4 |
| Single-strand selective monofunctional uracil DNA glycosylase (EC 3.2.2.-) | Smug1 | Q6P5C5 | 4 |
| Ski-like protein (Ski-related oncogene) (Ski-related protein) | Skil Skir Sno | Q60665 | 4 |
| Small integral membrane protein 19 | Smim19 | Q80ZU4 | 4 |
| Small integral membrane protein 7 | Smim7 | Q5RKS2 | 4 |
| Small integral membrane protein 8 | Smim8 | Q9CQQ0 | 4 |
| Small nuclear ribonucleoprotein G (snRNP-G) (Sm protein G) (Sm-G) (SmG) | Snrpg | P62309 | 4 |
| Smoothened homolog (SMO) | Smo Smoh | P56726 | 4 |
| SNW domain-containing protein 1 (Nuclear protein SkiP) (Ski-interacting protein) | Snw1 Skiip | Q9CSN1 | 4 |
| Sodium-coupled neutral amino acid transporter 2 (Amino acid transporter A2) (Solute carrier family 38 member 2) (System A amino acid transporter 2) (System A transporter 1) (System N amino acid transporter 2) | Slc38a2 Ata2 Kiaa1382 Sat2 Snat2 | Q8CFE6 | 4 |
| Solute carrier family 2, facilitated glucose transporter member 2 (Glucose transporter type 2, liver) (GLUT-2) | Slc2a2 Glut-2 Glut2 | P14246 | 4 |
| Solute carrier family 22 member 5 (High-affinity sodium-dependent carnitine cotransporter) (Organic cation/carnitine transporter 2) | Slc22a5 Octn2 | Q9Z0E8 | 4 |
| Solute carrier organic anion transporter family member 2A1 (Prostaglandin transporter) (PGT) (Solute carrier family 21 member 2) | Slco2a1 Oatp2a1 Slc21a2 | Q9EPT5 | 4 |
| Sortilin (Neurotensin receptor 3) (NTR3) (mNTR3) | Sort1 | Q6PHU5 | 4 |
| Sorting nexin-2 | Snx2 | Q9CWK8 | 4 |
| Sorting nexin-5 | Snx5 | Q9D8U8 | 4 |
| Sorting nexin-9 | Snx9 | Q91VH2 | 4 |
| Spectrin alpha chain, non-erythrocytic 1 | Sptan1 Spna2 | A3KGU5 | 4 |
| Sperm protamine P1 (Cysteine-rich protamine) | Prm1 Prm-1 | P02319 | 4 |
| Spermatogenesis-associated protein 5 (Spermatogenesis-associated factor protein) | Spata5 Spaf | Q3UMC0 | 4 |
| Spermatogenesis-defective protein 39 homolog (hSPE-39) (VPS33B-interacting protein in apical-basolateral polarity regulator) (VPS33B-interacting protein in polarity and apical restriction) | Vipas39 Spe39 Vipar | Q8BGQ1 | 4 |
| Splicing regulatory glutamine/lysine-rich protein 1 (Serine/arginine-rich-splicing regulatory protein 86) (SRrp86) (Splicing factor, arginine/serine-rich 12) | Srek1 Sfrs12 Srrp86 | Q8BZX4 | 4 |
| Sprouty-related, EVH1 domain-containing protein 2 (Spred-2) | Spred2 | Q924S7 | 4 |
| Squamous cell carcinoma antigen recognized by T-cells 3 (SART-3) (mSART-3) (Tumor-rejection antigen SART3) | Sart3 Kiaa0156 | Q9JLI8 | 4 |
| StAR-related lipid transfer protein 4 (START domain-containing protein 4) (StARD4) | Stard4 | Q99JV5 | 4 |
| STE20-like serine/threonine-protein kinase (STE20-like kinase) (mSLK) (EC 2.7.11.1) (Etk4) (STE20-related kinase SMAK) (STE20-related serine/threonine-protein kinase) (STE20-related kinase) (Serine/threonine-protein kinase 2) | Slk Kiaa0204 Stk2 | O54988 | 4 |
| Sterol regulatory element-binding protein 2 (SREBP-2) (Sterol regulatory element-binding transcription factor 2) [Cleaved into: Processed sterol regulatory element-binding protein 2] | Srebf2 Srebp2 | Q3U1N2 | 4 |
| Sterol-4-alpha-carboxylate 3-dehydrogenase, decarboxylating (EC 1.1.1.170) | Nsdhl | Q9R1J0 | 4 |
| Storkhead-box protein 2 | Stox2 Kiaa1392 | Q499E5 | 4 |
| Striatin-4 (Zinedin) | Strn4 Zin | P58404 | 4 |
| Stromal membrane-associated protein 2 (Stromal membrane-associated protein 1-like) | Smap2 Smap1l | Q7TN29 | 4 |
| Structural maintenance of chromosomes protein 2 (SMC protein 2) (SMC-2) (Chromosome-associated protein E) (FGF-inducible protein 16) (XCAP-E homolog) | Smc2 Cape Fin16 Smc2l1 | Q8CG48 | 4 |
| Succinate dehydrogenase cytochrome b560 subunit, mitochondrial (Integral membrane protein CII-3) (QPs-1) (QPs1) | Sdhc | Q9CZB0 | 4 |
| Succinate dehydrogenase [ubiquinone] iron-sulfur subunit, mitochondrial (EC 1.3.5.1) (Iron-sulfur subunit of complex II) (Ip) | Sdhb | Q9CQA3 | 4 |
| Succinate-semialdehyde dehydrogenase, mitochondrial (EC 1.2.1.24) (Aldehyde dehydrogenase family 5 member A1) (NAD(+)-dependent succinic semialdehyde dehydrogenase) | Aldh5a1 | Q8BWF0 | 4 |
| Succinyl-CoA ligase [GDP-forming] subunit beta, mitochondrial (EC 6.2.1.4) (GTP-specific succinyl-CoA synthetase subunit beta) (Succinyl-CoA synthetase beta-G chain) (SCS-betaG) | Suclg2 | Q9Z2I8 | 4 |
| Suppressor of cytokine signaling 3 (SOCS-3) (Cytokine-inducible SH2 protein 3) (CIS-3) (Protein EF-10) | Socs3 Cis3 Cish3 | O35718 | 4 |
| Surfeit locus protein 4 | Surf4 Surf-4 | Q64310 | 4 |
| Survival motor neuron protein | Smn1 Smn | P97801 | 4 |
| SUZ domain-containing protein 1 | Szrd1 D4Ertd22e | Q6NXN1 | 4 |
| SWI/SNF-related matrix-associated actin-dependent regulator of chromatin subfamily B member 1 (BRG1-associated factor 47) (BAF47) (Integrase interactor 1 protein) (SNF5 homolog) (mSNF5) | Smarcb1 Baf47 Ini1 Snf5l1 | Q9Z0H3 | 4 |
| SWI/SNF-related matrix-associated actin-dependent regulator of chromatin subfamily D member 2 (60 kDa BRG-1/Brm-associated factor subunit B) (BRG1-associated factor 60B) (BAF60B) | Smarcd2 Baf60b | Q99JR8 | 4 |
| Synapsin-2 (Synapsin II) | Syn2 | Q64332 | 4 |
| T-complex protein 1 subunit zeta-2 (TCP-1-zeta-2) (CCT-zeta-2) (Cctz-2) | Cct6b | Q61390 | 4 |
| Target of rapamycin complex subunit LST8 (TORC subunit LST8) (G protein beta subunit-like) (Protein GbetaL) (Mammalian lethal with SEC13 protein 8) (mLST8) | Mlst8 Gbl Lst8 | Q9DCJ1 | 4 |
| TATA box-binding protein-associated factor RNA polymerase I subunit D (TATA box-binding protein-associated factor 1D) (TBP-associated factor 1D) (Transcription initiation factor SL1/TIF-IB subunit D) | Taf1d Josd3 | Q9D4V4 | 4 |
| TBC1 domain family member 14 | Tbc1d14 D5Ertd110e Kiaa1322 | Q8CGA2 | 4 |
| Testis-expressed sequence 30 protein | Tex30 | Q3TUU5 | 4 |
| Tetraspanin-13 (Tspan-13) (Transmembrane 4 superfamily member 13) | Tspan13 Tm4sf13 | Q9D8C2 | 4 |
| Thioredoxin, mitochondrial (MTRX) (Mt-Trx) (Thioredoxin-2) | Txn2 | P97493 | 4 |
| Thyroid transcription factor 1-associated protein 26 (TTF-1-associated protein 26) (Coiled-coil domain-containing protein 59) | Ccdc59 D10Ertd718e Tap26 | Q8R2N0 | 4 |
| Tissue factor (TF) (Coagulation factor III) (CD antigen CD142) | F3 Cf-3 Cf3 | P20352 | 4 |
| TOX high mobility group box family member 4 (Epidermal Langerhans cell protein LCP1) | Tox4 | Q8BU11 | 4 |
| Transcription factor E2F5 (E2F-5) | E2f5 | Q61502 | 4 |
| Transcription factor IIIA (TFIIIA) | Gtf3a | Q8VHT7 | 4 |
| Transcription factor Maf (Proto-oncogene c-Maf) (V-maf musculoaponeurotic fibrosarcoma oncogene homolog) | Maf Maf2 | P54843 | 4 |
| Transcription initiation factor IIA subunit 1 (General transcription factor IIA subunit 1) [Cleaved into: Transcription initiation factor IIA alpha chain (TFIIA p35 subunit); Transcription initiation factor IIA beta chain (TFIIA p19 subunit)] | Gtf2a1 | Q99PM3 | 4 |
| Transcription initiation factor IIA subunit 2 (General transcription factor IIA subunit 2) (Transcription initiation factor IIA gamma chain) (TFIIA-gamma) | Gtf2a2 | Q80ZM7 | 4 |
| Transcriptional activator Myb (Proto-oncogene c-Myb) | Myb | P06876 | 4 |
| Transcriptional activator protein Pur-beta (Purine-rich element-binding protein B) (Vascular actin single-stranded DNA-binding factor 2 p44 component) | Purb | O35295 | 4 |
| Transcriptional repressor p66-beta (GATA zinc finger domain-containing protein 2B) (p66/p68) | Gatad2b | Q8VHR5 | 4 |
| Transducin beta-like protein 2 | Tbl2 | Q9R099 | 4 |
| Transforming acidic coiled-coil-containing protein 1 | Tacc1 | Q6Y685 | 4 |
| Translation machinery-associated protein 16 | Tma16 | Q9CR02 | 4 |
| Translationally-controlled tumor protein (TCTP) (21 kDa polypeptide) (p21) (p23) | Tpt1 Trt | P63028 | 4 |
| Translocon-associated protein subunit alpha (TRAP-alpha) (Signal sequence receptor subunit alpha) (SSR-alpha) | Ssr1 | Q9CY50 | 4 |
| Transmembrane and coiled-coil domains protein 3 | Tmcc3 | Q8R310 | 4 |
| Transmembrane protein 131-like | Kiaa0922 | Q3U3D7 | 4 |
| Transmembrane protein 183 | Tmem183 Tmem183a MNCb-2755 | Q9JJB9 | 4 |
| Transmembrane protein 214 | Tmem214 | Q8BM55 | 4 |
| Transmembrane protein 223 | Tmem223 | Q9CQE2 | 4 |
| Transmembrane protein 256 | Tmem256 | Q5F285 | 4 |
| Transmembrane protein C16orf54 homolog | 0 | Q8C708 | 4 |
| Triggering receptor expressed on myeloid cells 2 (TREM-2) (Triggering receptor expressed on monocytes 2) | Trem2 Trem2a Trem2b Trem2c | Q99NH8 | 4 |
| Trk-fused | Tfg mCG_130891 | Q8C2C6 | 4 |
| tRNA-specific adenosine deaminase 1 (mADAT1) (EC 3.5.4.34) (tRNA-specific adenosine-37 deaminase) | Adat1 | Q9JHI2 | 4 |
| Tubulin alpha-1A chain (Alpha-tubulin 1) (Alpha-tubulin isotype M-alpha-1) (Tubulin alpha-1 chain) | Tuba1a Tuba1 | P68369 | 4 |
| Tubulin alpha-1B chain (Alpha-tubulin 2) (Alpha-tubulin isotype M-alpha-2) (Tubulin alpha-2 chain) | Tuba1b Tuba2 | P05213 | 4 |
| Tumor protein p53-inducible nuclear protein 1 (Stress-induced protein) (Thymus-expressed acidic protein) (TEAP) (p53-dependent damage-inducible nuclear protein 1) (p53DINP1) | Trp53inp1 Sip | Q9QXE4 | 4 |
| U1 small nuclear ribonucleoprotein C (U1 snRNP C) (U1-C) (U1C) | Snrpc Snrp1c | Q62241 | 4 |
| U11/U12 small nuclear ribonucleoprotein 48 kDa protein (U11/U12 snRNP 48 kDa protein) | Snrnp48 | Q9D361 | 4 |
| U3 small nucleolar ribonucleoprotein protein MPP10 (M phase phosphoprotein 10) | Mphosph10 | Q810V0 | 4 |
| U6 snRNA-associated Sm-like protein LSm5 | Lsm5 | P62322 | 4 |