| Signal transducer and activator of transcription 5B | Stat5b | P42232 | 1 |
| Signal-induced proliferation-associated 1-like protein 1 (SIPA1-like protein 1) | Sipa1l1 Kiaa0440 | Q8C0T5 | 1 |
| Sine oculis-binding protein homolog (Jackson circler protein 1) | Sobp Jxc1 | Q0P5V2 | 1 |
| Single-minded homolog 1 (mSIM1) | Sim1 | Q61045 | 1 |
| Single-pass membrane and coiled-coil domain-containing protein 2 | Smco2 | Q9DA21 | 1 |
| Single-pass membrane protein with aspartate-rich tail 1, mitochondrial | Smdt1 | Q9DB10 | 1 |
| Single-stranded DNA-binding protein 2 (Sequence-specific single-stranded-DNA-binding protein 2) | Ssbp2 Ssdp2 | Q9CYZ8 | 1 |
| Sister chromatid cohesion protein PDS5 homolog A | Pds5a | E9QPI5 | 1 |
| Sjoegren syndrome/scleroderma autoantigen 1 homolog (Autoantigen p27 homolog) (Protein C184L) | Sssca1 C184l | P56873 | 1 |
| SLIT and NTRK-like protein 4 | Slitrk4 | Q810B8 | 1 |
| Slit homolog 2 protein (Slit-2) [Cleaved into: Slit homolog 2 protein N-product; Slit homolog 2 protein C-product] | Slit2 | Q9R1B9 | 1 |
| SLIT-ROBO Rho GTPase-activating protein 3 (srGAP3) (Rho GTPase-activating protein 14) (WAVE-associated Rac GTPase-activating protein) (WRP) | Srgap3 Arhgap14 Kiaa0411 Srgap2 | Q812A2 | 1 |
| Small EDRK-rich factor 1 (Protein 4F5) (m4F5) | Serf1 | O88892 | 1 |
| Small G protein signaling modulator 3 (RUN and TBC1 domain-containing protein 3) | Sgsm3 Cip85 Rutbc3 | Q8VCZ6 | 1 |
| Small glutamine-rich tetratricopeptide repeat-containing protein alpha (Alpha-SGT) | Sgta Sgt | Q8BJU0 | 1 |
| Small integral membrane protein 11 | Smim11 Fam165b | Q99J19 | 1 |
| Small integral membrane protein 12 | Smim12 | Q78RX3 | 1 |
| Small integral membrane protein 13 | Smim13 | E9Q942 | 1 |
| Small integral membrane protein 5 | Smim5 | Q8BT42 | 1 |
| Small membrane A-kinase anchor protein (Small membrane AKAP) (smAKAP) | 0 | Q9CPS8 | 1 |
| Small nuclear ribonucleoprotein E (snRNP-E) (Sm protein E) (Sm-E) (SmE) | Snrpe | P62305 | 1 |
| Small nuclear ribonucleoprotein-associated protein B (snRNP-B) (snRPB) (Sm protein B) (Sm-B) (SmB) | Snrpb | P27048 | 1 |
| Small proline-rich protein 2E | Sprr2e | O70556 | 1 |
| Small proline-rich protein 2K | Sprr2k | O70562 | 1 |
| Small subunit processome component 20 homolog | Utp20 | E9QK83 | 1 |
| Smoothelin | Smtn Smsmo | Q921U8 | 1 |
| Smoothelin-like protein 2 | Smtnl2 | Q8CI12 | 1 |
| Sn1-specific diacylglycerol lipase alpha (DGL-alpha) (EC 3.1.1.-) (Neural stem cell-derived dendrite regulator) | Dagla Kiaa0659 Nsddr | Q6WQJ1 | 1 |
| Sn1-specific diacylglycerol lipase beta (DGL-beta) (EC 3.1.1.-) | Daglb | Q91WC9 | 1 |
| SNARE-associated protein Snapin (Biogenesis of lysosome-related organelles complex 1 subunit 7) (BLOC-1 subunit 7) (Synaptosomal-associated protein 25-binding protein) (SNAP-associated protein) | Snapin Bloc1s7 Snap25bp Snapap | Q9Z266 | 1 |
| snRNA-activating protein complex subunit 4 (SNAPc subunit 4) (snRNA-activating protein complex 190 kDa subunit) (SNAPc 190 kDa subunit) | Snapc4 | Q8BP86 | 1 |
| Sodium channel subunit beta-3 | Scn3b | Q8BHK2 | 1 |
| Sodium- and chloride-dependent creatine transporter 1 (CT1) (Creatine transporter 1) (Solute carrier family 6 member 8) | Slc6a8 Crt | Q8VBW1 | 1 |
| Sodium- and chloride-dependent glycine transporter 1 (GlyT-1) (GlyT1) (Solute carrier family 6 member 9) | Slc6a9 Glyt1 | P28571 | 1 |
| Sodium-dependent phosphate transport protein 3 (Na(+)/PI cotransporter 3) (Sodium/phosphate cotransporter 3) (Solute carrier family 17 member 2) | Slc17a2 Npt3 | Q5SZA1 | 1 |
| Sodium-dependent phosphate transporter 1 (Gibbon ape leukemia virus receptor 1) (GLVR-1) (Leukemia virus receptor 1 homolog) (Phosphate transporter 1) (PiT-1) (Solute carrier family 20 member 1) | Slc20a1 Glvr1 Pit1 | Q61609 | 1 |
| Sodium-dependent phosphate transporter 2 (Phosphate transporter 2) (PiT-2) (Solute carrier family 20 member 2) (Type III sodium-dependent phosphate transporter) | Slc20a2 Pit2 | Q80UP8 | 1 |
| Sodium-independent sulfate anion transporter (Solute carrier family 26 member 11) | Slc26a11 | Q80ZD3 | 1 |
| Sodium/bile acid cotransporter 7 (Na(+)/bile acid cotransporter 7) (Solute carrier family 10 member 7) | Slc10a7 P7 | Q5PT53 | 1 |
| Sodium/hydrogen exchanger 9B1 (Na(+)/H(+) exchanger-like domain-containing protein 1) (NHE domain-containing protein 1) (Sodium/hydrogen exchanger-like domain-containing protein 1) (Solute carrier family 9 subfamily B member 1) | Slc9b1 Nhedc1 | Q8C0X2 | 1 |
| Sodium/potassium-transporting ATPase subunit alpha-2 (Na(+)/K(+) ATPase alpha-2 subunit) (EC 3.6.3.9) (Na(+)/K(+) ATPase alpha(+) subunit) (Sodium pump subunit alpha-2) | Atp1a2 | Q6PIE5 | 1 |
| Sodium/potassium-transporting ATPase subunit beta-1-interacting protein 1 (Na(+)/K(+)-transporting ATPase subunit beta-1-interacting protein 1) (Protein FAM77C) | Nkain1 Fam77c | Q9D035 | 1 |
| Sodium/potassium-transporting ATPase subunit gamma (Na(+)/K(+) ATPase subunit gamma) (FXYD domain-containing ion transport regulator 2) (Sodium pump gamma chain) | Fxyd2 Atp1c Atp1g1 | Q04646 | 1 |
| Soluble calcium-activated nucleotidase 1 (SCAN-1) (EC 3.6.1.6) (Apyrase homolog) | Cant1 | Q8VCF1 | 1 |
| Solute carrier family 10 member 6 (Sodium-dependent organic anion transporter) | Slc10a6 Soat | Q9CXB2 | 1 |
| Solute carrier family 12 member 2 (Basolateral Na-K-Cl symporter) (Bumetanide-sensitive sodium-(potassium)-chloride cotransporter 1) | Slc12a2 Nkcc1 | P55012 | 1 |
| Solute carrier family 12 member 6 (Electroneutral potassium-chloride cotransporter 3) (K-Cl cotransporter 3) | Slc12a6 Kcc3 | Q924N4 | 1 |
| Solute carrier family 12 member 7 (Electroneutral potassium-chloride cotransporter 4) (K-Cl cotransporter 4) | Slc12a7 Kcc4 | Q9WVL3 | 1 |
| Solute carrier family 22 member 12 (Renal-specific transporter) (RST) (Urate anion exchanger 1) | Slc22a12 Urat1 | Q8CFZ5 | 1 |
| Solute carrier family 22 member 23 | Slc22a23 | Q3UHH2 | 1 |
| Solute carrier family 23 member 1 (Na(+)/L-ascorbic acid transporter 1) (Sodium-dependent vitamin C transporter 1) (Yolk sac permease-like molecule 3) | Slc23a1 Svct1 Yspl3 | Q9Z2J0 | 1 |
| Solute carrier family 23 member 2 (Na(+)/L-ascorbic acid transporter 2) (Sodium-dependent vitamin C transporter 2) (SVCT-2) (mSVCT2) (Yolk sac permease-like molecule 2) | Slc23a2 Kiaa0238 Svct2 Yspl2 | Q9EPR4 | 1 |
| Solute carrier family 25 member 36 | Slc25a36 | Q922G0 | 1 |
| Solute carrier family 25 member 45 | Slc25a45 | Q8CFJ7 | 1 |
| Solute carrier family 26 member 10 | Slc26a10 | F8WGV3 | 1 |
| Solute carrier family 35 member C2 (Ovarian cancer-overexpressed gene 1 protein) | Slc35c2 Ovcov1 | Q8VCX2 | 1 |
| Solute carrier family 35 member E2 | Slc35e2 | Q8C811 | 1 |
| Solute carrier family 35 member E4 | Slc35e4 | Q8K3D6 | 1 |
| Solute carrier family 41 member 3 | Slc41a3 | Q921R8 | 1 |
| Solute carrier family 43 member 3 (Embryonic epithelia gene 1 protein) | Slc43a3 Eeg1 | A2AVZ9 | 1 |
| Solute carrier organic anion transporter family member 1A5 (Organic anion-transporting polypeptide 3) (OATP-3) (Sodium-independent organic anion transporter 3) (Solute carrier family 21 member 7) | Slco1a5 Oatp1a5 Oatp3 Slc21a7 | Q91YY5 | 1 |
| Sorcin | Sri | Q6P069 | 1 |
| Sortilin-related receptor (Gp250) (Low-density lipoprotein receptor relative with 11 ligand-binding repeats) (LDLR relative with 11 ligand-binding repeats) (LR11) (SorLA-1) (Sorting protein-related receptor containing LDLR class A repeats) (mSorLA) | Sorl1 | O88307 | 1 |
| Sorting nexin-1 | Snx1 | Q9WV80 | 1 |
| Sorting nexin-13 | Snx13 | Q6PHS6 | 1 |
| Sorting nexin-15 | Snx15 | Q91WE1 | 1 |
| Sorting nexin-16 | Snx16 | Q8C080 | 1 |
| Sorting nexin-7 | Snx7 | F8WI30 | 1 |
| Sorting nexin-8 | Snx8 | Q8CFD4 | 1 |
| SOSS complex subunit B1 (Nucleic acid-binding protein 2) (Oligonucleotide/oligosaccharide-binding fold-containing protein 2B) (Sensor of single-strand DNA complex subunit B1) (Sensor of ssDNA subunit B1) (SOSS-B1) (Single-stranded DNA-binding protein 1) | Nabp2 Obfc2b Ssb1 | Q8R2Y9 | 1 |
| Speedy protein A (Protein expressed in male leptotene and zygotene spermatocytes 465) (MLZ-465) (Rapid inducer of G2/M progression in oocytes A) (RINGO A) (mSpy/Ringo A) (Speedy-1) (Spy1) | Spdya Spdy1 | Q5IBH7 | 1 |
| Sperm motility kinase Z (EC 2.7.11.1) | Gm4922 | Q8C0N0 | 1 |
| Sperm-associated antigen 1 (Infertility-related sperm protein Spag-1) (TPR-containing protein involved in spermatogenesis) (TPIS) | Spag1 Tpis | Q80ZX8 | 1 |
| Sperm-specific antigen 2 homolog (Ki-ras-induced actin-interacting protein) | Ssfa2 Kiaa1927 Krap | Q922B9 | 1 |
| Spermatogenesis-associated protein 24 (TATA-binding protein-like factor-interacting protein) (TLF-interacting protein) (TRF2-interacting protein in testis) (Testis protein T6441 homolog) | Spata24 Tipt Tipt2 | Q6P926 | 1 |
| Spermatogenesis-associated serine-rich protein 1 (Dvl2-DEP domain-interacting protein) | Spats1 Ddip | A2RRY8 | 1 |
| Spermatogenic leucine zipper protein 1 (BHLH-Zip transcription factor SPZ1) (Spermatogenic Zip 1) | Spz1 | Q99MY0 | 1 |
| Sphingolipid delta(4)-desaturase DES1 (EC 1.14.-.-) (Degenerative spermatocyte homolog 1) | Degs1 Degs Des1 Mdes | O09005 | 1 |
| Sphingomyelin phosphodiesterase 4 (EC 3.1.4.12) (Neutral sphingomyelinase 3) (nSMase-3) (nSMase3) (Neutral sphingomyelinase III) | Smpd4 Kiaa1418 | Q6ZPR5 | 1 |
| Sphingomyelin synthase-related protein 1 (SMSr) (EC 2.7.8.-) (Ceramide phosphoethanolamine synthase) (CPE synthase) (Sterile alpha motif domain-containing protein 8) (SAM domain-containing protein 8) | Samd8 | Q9DA37 | 1 |
| Sphingosine-1-phosphate lyase 1 (S1PL) (SP-lyase 1) (SPL 1) (mSPL) (EC 4.1.2.27) (Sphingosine-1-phosphate aldolase) | Sgpl1 | Q8R0X7 | 1 |
| Splicing factor 3A subunit 1 (SF3a120) | Sf3a1 | Q8K4Z5 | 1 |
| Splicing factor 45 (45 kDa-splicing factor) (RNA-binding motif protein 17) | Rbm17 Spf45 | Q8JZX4 | 1 |
| Splicing factor U2AF 26 kDa subunit (U2 auxiliary factor 26) (U2 small nuclear RNA auxiliary factor 1-like protein 4) | U2af1l4 U2af26 | Q8BGJ9 | 1 |
| Splicing factor U2AF 35 kDa subunit (U2 auxiliary factor 35 kDa subunit) (U2 snRNP auxiliary factor small subunit) | U2af1 | Q9D883 | 1 |
| Splicing factor, arginine/serine-rich 19 (SR-related and CTD-associated factor 1) | Scaf1 Sfrs19 | Q5U4C3 | 1 |
| Spondin-1 (F-spondin) | Spon1 | Q8VCC9 | 1 |
| SPRY domain-containing SOCS box protein 1 (SSB-1) | Spsb1 Ssb1 | Q9D5L7 | 1 |
| Src kinase-associated phosphoprotein 2 (Pyk2/RAFTK-associated protein) (SKAP55 homolog) (SKAP-HOM) (Src family-associated phosphoprotein 2) (Src kinase-associated phosphoprotein 55-related protein) (Src-associated adapter protein with PH and SH3 domains) | Skap2 Prap Ra70 Saps Scap2 Skap55r | Q3UND0 | 1 |
| Staphylococcal nuclease domain-containing protein 1 (100 kDa coactivator) (p100 co-activator) | Snd1 | Q78PY7 | 1 |
| StAR-related lipid transfer protein 3 (Protein ES 64) (Protein MLN 64) (START domain-containing protein 3) (StARD3) | Stard3 Es64 Mln64 | Q61542 | 1 |
| StAR-related lipid transfer protein 7, mitochondrial (START domain-containing protein 7) (StARD7) | Stard7 | Q8R1R3 | 1 |
| Stathmin-3 (Hippocampus abundant transcript 3) (SCG10-like protein) (SCG10-related protein HiAT3) | Stmn3 Sclip | O70166 | 1 |
| STE20-related kinase adapter protein beta (STRAD beta) (Amyotrophic lateral sclerosis 2 chromosomal region candidate gene 2 protein homolog) (ILP-interacting protein homolog) (Polyploidy-associated protein kinase) (Pseudokinase ALS2CR2) | Stradb Als2cr2 Papk Syradb | Q8K4T3 | 1 |
| Sterile alpha motif domain-containing protein 11 | Samd11 | J3QN61 | 1 |
| Sterile alpha motif domain-containing protein 14 (SAM domain-containing protein 14) | Samd14 | Q8K070 | 1 |
| Steroid 17-alpha-hydroxylase/17,20 lyase (EC 1.14.99.9) (EC 4.1.2.30) (17-alpha-hydroxyprogesterone aldolase) (CYPXVII) (Cytochrome P450 17A1) (Cytochrome P450-C17) (Cytochrome P450c17) | Cyp17a1 Cyp17 | P27786 | 1 |
| Steroid hormone receptor ERR1 (Estrogen receptor-like 1) (Estrogen-related receptor alpha) (ERR-alpha) (Nuclear receptor subfamily 3 group B member 1) | Esrra Err1 Estrra Nr3b1 | O08580 | 1 |
| Steroid hormone receptor ERR2 (Estrogen receptor-like 2) (Estrogen-related receptor beta) (ERR-beta) (Nuclear receptor subfamily 3 group B member 2) | Esrrb Err-2 Err2 Nr3b2 | Q61539 | 1 |
| Steroid receptor RNA activator 1 (Steroid receptor RNA activator protein) (SRAP) | Sra1 | Q80VJ2 | 1 |