| SH3 domain-binding glutamic acid-rich-like protein 3 | Sh3bgrl3 | I7HPY0 | 1 |
| SH3 domain-binding protein 1 | Sh3bp1 | A2A5V2 | 1 |
| SH3 domain-binding protein 1 | Sh3bp1 | S4R2D3 | 1 |
| SH3 domain-binding protein 5 (SH3BP-5) (SH3 domain-binding protein that preferentially associates with BTK) | Sh3bp5 Sab | Q9Z131 | 1 |
| SH3 domain-containing protein 19 (Kryn) | Sh3d19 | Q91X43 | 1 |
| SH3 domain-containing YSC84-like protein 1 | Sh3yl1 | O08641 | 1 |
| Short coiled-coil protein | Scoc Scoco | Q78YZ6 | 1 |
| Short stature homeobox protein 2 (Homeobox protein Og12X) (OG-12) (Paired family homeodomain protein Prx3) | Shox2 Og12x Prx3 | P70390 | 1 |
| Short/branched chain-specific acyl-CoA dehydrogenase, mitochondrial | Acadsb | E9Q5L3 | 1 |
| Shugoshin 2 (Shugoshin-2) (Shugoshin-like 2) | Sgo2 Sgol2 Sgol2a | Q7TSY8 | 1 |
| Sialidase-1 (EC 3.2.1.18) (G9 sialidase) (Lysosomal sialidase) (N-acetyl-alpha-neuraminidase 1) | Neu1 Neu | O35657 | 1 |
| Sialidase-3 (EC 3.2.1.18) (Ganglioside sialidase) (Membrane sialidase) (N-acetyl-alpha-neuraminidase 3) | Neu3 | Q9JMH7 | 1 |
| Sickle tail protein (Enhancer trap locus 4) | Skt Etl4 Kiaa1217 | A2AQ25 | 1 |
| SID1 transmembrane family member 2 (Fragment) | Sidt2 | E0CXC7 | 1 |
| Sideroflexin-5 | Sfxn5 | Q925N0 | 1 |
| Signal peptidase complex catalytic subunit SEC11 (EC 3.4.21.89) | Sec11a Sec11l1 mCG_15305 | D3YTS1 | 1 |
| Signal peptidase complex catalytic subunit SEC11 (EC 3.4.21.89) | Sec11a Sec11l1 mCG_15305 | D3Z569 | 1 |
| Signal peptidase complex catalytic subunit SEC11C (Fragment) | Sec11c | D3Z5H3 | 1 |
| Signal peptide, CUB and EGF-like domain-containing protein 1 | Scube1 | Q6NZL8 | 1 |
| Signal peptide, CUB and EGF-like domain-containing protein 3 | Scube3 | Q66PY1 | 1 |
| Signal recognition particle subunit SRP68 (SRP68) | Srp68 | A2AAN2 | 1 |
| Signal transducer and activator of transcription | Stat5a | B2C3G8 | 1 |
| Signal transducer and activator of transcription | Stat3 | B7ZC18 | 1 |
| Signal transducer and activator of transcription 5A (Mammary gland factor) | Stat5a Mgf Mpf | P42230 | 1 |
| Signal transducer and transcription activator 6 | Stat6 | P52633 | 1 |
| Signal transducing adapter molecule 1 (Fragment) | Stam | A2ARJ0 | 1 |
| Signal-induced proliferation-associated protein 1 (Sipa-1) (GTPase-activating protein Spa-1) | Sipa1 Spa-1 Spa1 | P46062 | 1 |
| Sin3 histone deacetylase corepressor complex component SDS3 (Suppressor of defective silencing 3 protein homolog) | Suds3 Sds3 | Q8BR65 | 1 |
| Sister chromatid cohesion protein PDS5 homolog B | Pds5b | F8WHU5 | 1 |
| Slc12a6 protein | Slc12a6 Gm21985 | Q6P6P5 | 1 |
| SLIT and NTRK-like protein 2 | Slitrk2 | Q810C0 | 1 |
| Slit homolog 2 protein | Slit2 | G3UY21 | 1 |
| Slit homolog 2 protein | Slit2 | G3UYX7 | 1 |
| Slit homolog 2 protein | Slit2 | G3X909 | 1 |
| SLIT-ROBO Rho GTPase-activating protein 1 | Srgap1 | D3YZW1 | 1 |
| Small kinetochore-associated protein | Knstrn D2Ertd750e | A3KGG8 | 1 |
| Small kinetochore-associated protein (Fragment) | Knstrn D2Ertd750e | F7BE71 | 1 |
| Small kinetochore-associated protein (Fragment) | Knstrn D2Ertd750e | H3BKK2 | 1 |
| Small kinetochore-associated protein (SKAP) (Kinetochore-localized astrin-binding protein) (Kinastrin) (Kinetochore-localized astrin/SPAG5-binding protein) (TRAF4-associated factor 1) | Knstrn D2Ertd750e Skap Traf4af1 | Q9D9Z1 | 1 |
| Small nuclear ribonucleoprotein E | Snrpe | E9Q4F4 | 1 |
| Small nuclear ribonucleoprotein E (Fragment) | Snrpe | E9PZG9 | 1 |
| Small subunit processome component 20 homolog | Utp20 | E9QK83 | 1 |
| Small ubiquitin-related modifier 3 (SUMO-3) (SMT3 homolog 1) (Ubiquitin-like protein SMT3A) (Smt3A) | Sumo3 Smt3a Smt3h1 | Q9Z172 | 1 |
| Smoothelin | Smtn | D3Z3Q3 | 1 |
| Sn1-specific diacylglycerol lipase beta (DGL-beta) (EC 3.1.1.-) | Daglb | Q91WC9 | 1 |
| SNW domain-containing protein 1 | Snw1 | A0A0B4J1E2 | 1 |
| Sodium bicarbonate transporter-like protein 11 (Bicarbonate transporter-related protein 1) (Sodium borate cotransporter 1) (NaBC1) (Solute carrier family 4 member 11) | Slc4a11 BTR1 | A2AJN7 | 1 |
| Sodium channel protein type 8 subunit alpha (Sodium channel protein type VIII subunit alpha) (Voltage-gated sodium channel subunit alpha Nav1.6) | Scn8a Nbna1 | Q9WTU3 | 1 |
| Sodium- and chloride-dependent glycine transporter 1 | Slc6a9 | E9Q3V0 | 1 |
| Sodium- and chloride-dependent glycine transporter 1 | Slc6a9 | E9Q517 | 1 |
| Sodium- and chloride-dependent glycine transporter 2 (GlyT-2) (GlyT2) (Solute carrier family 6 member 5) | Slc6a5 Glyt2 | Q761V0 | 1 |
| Sodium-coupled monocarboxylate transporter 1 (Electrogenic sodium monocarboxylate cotransporter) (Solute carrier family 5 member 8) | Slc5a8 Smct Smct1 | Q8BYF6 | 1 |
| Sodium-coupled neutral amino acid transporter 4 (Amino acid transporter A3) (Na(+)-coupled neutral amino acid transporter 4) (Solute carrier family 38 member 4) (System A amino acid transporter 3) | Slc38a4 Ata3 Nat3 Snat4 | Q8R1S9 | 1 |
| Sodium-dependent multivitamin transporter (Na(+)-dependent multivitamin transporter) (Solute carrier family 5 member 6) | Slc5a6 | Q5U4D8 | 1 |
| Sodium-dependent neutral amino acid transporter B(0)AT2 (Sodium- and chloride-dependent neurotransmitter transporter NTT73) (Solute carrier family 6 member 15) (Transporter v7-3) | Slc6a15 B0at2 Ntt73 | Q8BG16 | 1 |
| Sodium-dependent neutral amino acid transporter SLC6A17 (Sodium-dependent neurotransmitter transporter NTT4) (Solute carrier family 6 member 17) | Slc6a17 Ntt4 | Q8BJI1 | 1 |
| Sodium-dependent noradrenaline transporter (Norepinephrine transporter) (NET) (Solute carrier family 6 member 2) | Slc6a2 | O55192 | 1 |
| Sodium/hydrogen exchanger | Slc9a6 | A1L3P4 | 1 |
| Sodium/hydrogen exchanger | Slc9a8 | A2A464 | 1 |
| Sodium/hydrogen exchanger | Slc9a6 | B0QZV3 | 1 |
| Sodium/hydrogen exchanger | Slc9a2 | Q3ZAS0 | 1 |
| Sodium/hydrogen exchanger 8 (Na(+)/H(+) exchanger 8) (NHE-8) (Solute carrier family 9 member 8) | Slc9a8 Nhe8 | Q8R4D1 | 1 |
| Sodium/hydrogen exchanger 9 (Na(+)/H(+) exchanger 9) (NHE-9) (Solute carrier family 9 member 9) | Slc9a9 Nhe9 | Q8BZ00 | 1 |
| Sodium/hydrogen exchanger 9B2 (NHA-oc) (Na(+)/H(+) exchanger NHA2) (Na(+)/H(+) exchanger-like domain-containing protein 2) (NHE domain-containing protein 2) (Soditlum/hydrogen exchanger-like domain-containing protein 2) (Solute carrier family 9 subfamily B member 2) | Slc9b2 Nha2 Nhedc2 | Q5BKR2 | 1 |
| Sodium/potassium-transporting ATPase subunit alpha (EC 3.6.3.-) | Atp1a3 mCG_7257 | A0A0G2JGX4 | 1 |
| Sodium/potassium-transporting ATPase subunit alpha (EC 3.6.3.-) (Fragment) | Atp1a3 | Q8R0B0 | 1 |
| Sodium/potassium-transporting ATPase subunit beta | Atp1b1 mCG_9368 | Q545P0 | 1 |
| Sodium/potassium-transporting ATPase subunit beta | Atp1b2 mCG_20899 RP23-56I20.2-001 | Q3UR55 | 1 |
| Sodium/potassium-transporting ATPase subunit beta-1-interacting protein 4 (Na(+)/K(+)-transporting ATPase subunit beta-1-interacting protein 4) (Protein FAM77A) | Nkain4 Fam77a | Q9JMG4 | 1 |
| Solute carrier family 12 member 4 | Slc12a4 | F8WIJ0 | 1 |
| Solute carrier family 2, facilitated glucose transporter member 4 | Slc2a4 | J3QK17 | 1 |
| Solute carrier family 22 member 5 (High-affinity sodium-dependent carnitine cotransporter) (Organic cation/carnitine transporter 2) | Slc22a5 Octn2 | Q9Z0E8 | 1 |
| Solute carrier family 26 member 6 | Slc26a6 | A0A0A0MQB3 | 1 |
| Solute carrier family 26 member 6 (Anion exchange transporter) (Chloride-formate exchanger) (Pendrin-L1) (Pendrin-like protein 1) (Putative anion transporter-1) (Pat-1) | Slc26a6 Cfex Pat1 | Q8CIW6 | 1 |
| Solute carrier family 27 (fatty acid transporter), member 6 | Slc27a6 | E9Q9W4 | 1 |
| Solute carrier family 35 member G1 (Transmembrane protein 20) | Slc35g1 Tmem20 | Q8BY79 | 1 |
| Solute carrier family 45 member 4 (Fragment) | Slc45a4 | F7BEQ1 | 1 |
| Solute carrier organic anion transporter family member 1B2 (Liver-specific organic anion transporter 1) (LST-1) (SLC21A6) (Solute carrier family 21 member 10) | Slco1b2 Oatp1b2 Slc21a10 | Q9JJL3 | 1 |
| Solute carrier organic anion transporter family member 4C1 (Oatp-R) (Solute carrier family 21 member 20) | Slco4c1 Oatp4c1 Slc21a20 | Q8BGD4 | 1 |
| Somatotropin (Growth hormone) | Gh1 Gh | P06880 | 1 |
| Sorbin and SH3 domain-containing protein 1 | Sorbs1 | D3Z5J3 | 1 |
| Sorbin and SH3 domain-containing protein 1 | Sorbs1 | E9PYX6 | 1 |
| Sorbin and SH3 domain-containing protein 1 | Sorbs1 | E9QNA7 | 1 |
| Sorbin and SH3 domain-containing protein 2 (Arg-binding protein 2) (ArgBP2) (Arg/Abl-interacting protein 2) | Sorbs2 Argbp2 Kiaa0777 | Q3UTJ2 | 1 |
| Sorting nexin-14 | Snx14 | G3UWA3 | 1 |
| Sorting nexin-14 | Snx14 | G3UX33 | 1 |
| Sorting nexin-14 | Snx14 | G3UXB6 | 1 |
| Sorting nexin-16 | Snx16 | Q8C080 | 1 |
| Sorting nexin-3 | Snx3 | D3Z789 | 1 |
| Sorting nexin-30 | Snx30 | Q8CE50 | 1 |
| Sorting nexin-7 | Snx7 | Q9CY18 | 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 |
| SOSS complex subunit C (INTS3- and NABP-interacting protein) (Sensor of single-strand DNA complex subunit C) (Sensor of ssDNA subunit C) (SOSS-C) (Single-stranded DNA-binding protein-interacting protein 1) (SSB-interacting protein 1) | Inip Ssbip1 | Q3TXT3 | 1 |
| SPARC-related modular calcium-binding protein 1 (SPARC-related gene protein) (Secreted modular calcium-binding protein 1) (SMOC-1) | Smoc1 Srg | Q8BLY1 | 1 |
| Spatacsin (Spastic paraplegia 11 protein homolog) | Spg11 Kiaa1840 | Q3UHA3 | 1 |
| Speckle targeted PIP5K1A-regulated poly(A) polymerase (Star-PAP) (EC 2.7.7.19) (RNA-binding motif protein 21) (RNA-binding protein 21) (U6 snRNA-specific terminal uridylyltransferase 1) (U6-TUTase) (EC 2.7.7.52) | Tut1 Rbm21 | Q8R3F9 | 1 |
| Spectrin alpha chain, non-erythrocytic 1 | Sptan1 Spna2 | E9Q447 | 1 |
| Spectrin beta chain | Sptb Spnb1 mCG_123942 | Q3UGX2 | 1 |
| Spectrin beta chain | Sptbn2 Spnb3 | Q3UGZ4 | 1 |
| Spectrin beta chain, erythrocytic (Beta-I spectrin) | Sptb Spnb-1 Spnb1 Sptb1 | P15508 | 1 |