| Selenoprotein S (SelS) (Minor histocompatibility antigen H47) | Selenos H47 Vimp | Q9BCZ4 | 1 |
| Selenoprotein T (SelT) (Thioredoxin reductase-like enzyme) (EC 1.8.1.9) | Selenot Selt | P62342 | 1 |
| Semaphorin-3A (Semaphorin III) (Sema III) (Semaphorin-D) (Sema D) | Sema3a Semad SemD | O08665 | 1 |
| Semaphorin-3F (Semaphorin IV) (Sema IV) | Sema3f | O88632 | 1 |
| Semaphorin-6A | Sema6a | D3YWM8 | 1 |
| Semaphorin-6A | Sema6a | K3W4S5 | 1 |
| Semaphorin-6B (Semaphorin VIB) (Sema VIB) (Semaphorin-N) (Sema N) | Sema6b Seman | O54951 | 1 |
| Semaphorin-6D | Sema6d | A2AW73 | 1 |
| Sentrin-specific protease 1 (EC 3.4.22.68) (SUMO-1 protease 2) (SuPr-2) (Sentrin/SUMO-specific protease SENP1) | Senp1 Supr2 | P59110 | 1 |
| Septin-1 (Differentiation protein 6) (Protein Diff6) (Peanut-like protein 3) | Sept1 Diff6 Pnutl3 | P42209 | 1 |
| Septin-11 | Sept11 | A0A0J9YTY0 | 1 |
| Septin-4 (Fragment) | Sept4 | Q5ND18 | 1 |
| Septin-5 (Cell division control-related protein 1) (CDCrel-1) (Peanut-like protein 1) | Sept5 Pnutl1 | Q9Z2Q6 | 1 |
| Septin-8 | Sept8 | B1AQY9 | 1 |
| Septin-8 | Sept8 | B7ZC46 | 1 |
| Sequestosome-1 | Sqstm1 | D3YZJ1 | 1 |
| Serine (or cysteine) peptidase inhibitor, clade A, member 3I | Serpina3i | D3Z450 | 1 |
| Serine (Or cysteine) peptidase inhibitor, clade A, member 3N, isoform CRA_a (Serine protease inhibitor A3N) | Serpina3n mCG_3346 | G3X8T9 | 1 |
| Serine (or cysteine) peptidase inhibitor, clade B, member 6a (Fragment) | Serpinb6a | E9PYY0 | 1 |
| Serine (or cysteine) peptidase inhibitor, clade B, member 6a (Fragment) | Serpinb6a | E9Q0P9 | 1 |
| Serine (or cysteine) peptidase inhibitor, clade B, member 6a (Fragment) | Serpinb6a | E9Q108 | 1 |
| Serine (or cysteine) peptidase inhibitor, clade B, member 6a (Fragment) | Serpinb6a | E9Q3Y1 | 1 |
| Serine (or cysteine) peptidase inhibitor, clade B, member 6a (Fragment) | Serpinb6a | E9Q6X2 | 1 |
| Serine (or cysteine) peptidase inhibitor, clade B, member 6a (Fragment) | Serpinb6a | K7E6F1 | 1 |
| Serine dehydratase-like (EC 4.3.1.17) (L-serine deaminase) (L-serine dehydratase/L-threonine deaminase) (L-threonine dehydratase) (TDH) (EC 4.3.1.19) (SDH) | Sdsl Sds | Q8R238 | 1 |
| Serine hydrolase-like protein (SHL) (EC 3.1.-.-) | Serhl | Q9EPB5 | 1 |
| Serine hydroxymethyltransferase (EC 2.1.2.1) (Fragment) | Shmt1 | G3UYY1 | 1 |
| 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 | 1 |
| Serine protease hepsin (EC 3.4.21.106) [Cleaved into: Serine protease hepsin non-catalytic chain; Serine protease hepsin catalytic chain] | Hpn | O35453 | 1 |
| Serine protease HTRA2, mitochondrial | Htra2 | D3YX27 | 1 |
| Serine protease HTRA2, mitochondrial | Htra2 | D3YX28 | 1 |
| Serine protease HTRA2, mitochondrial (Fragment) | Htra2 | F6TCV0 | 1 |
| Serine--pyruvate aminotransferase, mitochondrial (SPT) (EC 2.6.1.51) (Alanine--glyoxylate aminotransferase) (AGT) (EC 2.6.1.44) | Agxt Agxt1 | O35423 | 1 |
| Serine--tRNA ligase, cytoplasmic (Fragment) | Sars | A2AFS1 | 1 |
| Serine/arginine repetitive matrix protein 1 | Srrm1 | A2A8V8 | 1 |
| Serine/arginine repetitive matrix protein 1 | Srrm1 | A2A8V9 | 1 |
| Serine/arginine repetitive matrix protein 1 | Srrm1 | E9PUK6 | 1 |
| Serine/arginine repetitive matrix protein 1 | Srrm1 | E9QKA4 | 1 |
| Serine/Arginine-related protein 53 (SRrp53) (Arginine/serine-rich coiled-coil protein 1) | Rsrc1 Srrp53 | Q9DBU6 | 1 |
| Serine/arginine-rich-splicing factor 1 | Srsf1 | H7BX95 | 1 |
| Serine/arginine-rich-splicing factor 11 | Srsf11 | D6RE22 | 1 |
| Serine/arginine-rich-splicing factor 11 | Srsf11 | E9Q6E5 | 1 |
| Serine/arginine-rich-splicing factor 11 (Fragment) | Srsf11 | F6TN80 | 1 |
| Serine/threonine-protein kinase 11-interacting protein (LKB1-interacting protein 1) | Stk11ip Lip1 Lkb1ip | Q3TAA7 | 1 |
| Serine/threonine-protein kinase 17B (EC 2.7.11.1) (DAP kinase-related apoptosis-inducing protein kinase 2) | Stk17b Drak2 | Q8BG48 | 1 |
| Serine/threonine-protein kinase 25 (Fragment) | Stk25 | D3Z359 | 1 |
| Serine/threonine-protein kinase 33 (EC 2.7.11.1) | Stk33 | Q924X7 | 1 |
| Serine/threonine-protein kinase ATR | Atr | E9QPK4 | 1 |
| Serine/threonine-protein kinase Chk1 | Chek1 | G3UYC5 | 1 |
| Serine/threonine-protein kinase Chk1 (EC 2.7.11.1) (CHK1 checkpoint homolog) (Checkpoint kinase-1) | Chek1 Chk1 | O35280 | 1 |
| Serine/threonine-protein kinase D3 | Prkd3 | D3Z6I0 | 1 |
| Serine/threonine-protein kinase greatwall (GW) (GWL) (EC 2.7.11.1) (Microtubule-associated serine/threonine-protein kinase-like) (MAST-L) | Mastl Gw Gwl | Q8C0P0 | 1 |
| Serine/threonine-protein kinase MARK2 (Fragment) | Mark2 | E9Q2J6 | 1 |
| Serine/threonine-protein kinase MRCK alpha | Cdc42bpa | D3YYN8 | 1 |
| Serine/threonine-protein kinase MRCK alpha | Cdc42bpa | E9PVY0 | 1 |
| Serine/threonine-protein kinase MRCK gamma (EC 2.7.11.1) (CDC42-binding protein kinase gamma) (DMPK-like gamma) (Myotonic dystrophy kinase-related CDC42-binding kinase gamma) (MRCK gamma) (Myotonic dystrophy protein kinase-like gamma) (Myotonic dystrophy protein kinase-like alpha) | Cdc42bpg | Q80UW5 | 1 |
| Serine/threonine-protein kinase N2 | Pkn2 | G3UZM9 | 1 |
| Serine/threonine-protein kinase N2 (EC 2.7.11.13) (PKN gamma) (Protein kinase C-like 2) (Protein-kinase C-related kinase 2) | Pkn2 Prk2 Prkcl2 | Q8BWW9 | 1 |
| Serine/threonine-protein kinase Nek6 | Nek6 | A2ATN9 | 1 |
| Serine/threonine-protein kinase PAK 3 (EC 2.7.11.1) (Beta-PAK) (CDC42/RAC effector kinase PAK-B) (p21-activated kinase 3) (PAK-3) | Pak3 Pak-3 Pakb Stk4 | Q61036 | 1 |
| Serine/threonine-protein kinase PINK1, mitochondrial (EC 2.7.11.1) (BRPK) (PTEN-induced putative kinase protein 1) | Pink1 | Q99MQ3 | 1 |
| Serine/threonine-protein kinase RIO3 (EC 2.7.11.1) (RIO kinase 3) | Riok3 | Q9DBU3 | 1 |
| Serine/threonine-protein kinase SIK3 | Sik3 | E9PU87 | 1 |
| Serine/threonine-protein kinase SIK3 (EC 2.7.11.1) (Salt-inducible kinase 3) (SIK-3) (Serine/threonine-protein kinase QSK) | Sik3 Kiaa0999 Qsk | Q6P4S6 | 1 |
| Serine/threonine-protein kinase SIK3 (Fragment) | Sik3 | F6S7W6 | 1 |
| Serine/threonine-protein kinase SIK3 (Fragment) | Sik3 | F6U6U5 | 1 |
| Serine/threonine-protein kinase SMG1 (Fragment) | Smg1 | J3QQ22 | 1 |
| Serine/threonine-protein kinase STK11 | Stk11 | E9Q811 | 1 |
| Serine/threonine-protein kinase tousled-like 2 | Tlk2 | B1ASU9 | 1 |
| Serine/threonine-protein kinase tousled-like 2 | Tlk2 | B7ZC85 | 1 |
| Serine/threonine-protein kinase tousled-like 2 (EC 2.7.11.1) (PKU-alpha) (Tousled-like kinase 2) | Tlk2 Tlk | O55047 | 1 |
| Serine/threonine-protein kinase WNK4 | Wnk4 | E9PZ38 | 1 |
| Serine/threonine-protein kinase WNK4 | Wnk4 | E9Q470 | 1 |
| Serine/threonine-protein kinase WNK4 (EC 2.7.11.1) (Protein kinase lysine-deficient 4) (Protein kinase with no lysine 4) | Wnk4 Prkwnk4 | Q80UE6 | 1 |
| Serine/threonine-protein phosphatase (EC 3.1.3.16) | Ppp3cb | E9Q6P2 | 1 |
| Serine/threonine-protein phosphatase (EC 3.1.3.16) | Ppp3cb mCG_5935 | G3X8U7 | 1 |
| Serine/threonine-protein phosphatase 1 regulatory subunit 10 (MHC class I region proline-rich protein CAT53) | Ppp1r10 Cat53 Pnuts | Q80W00 | 1 |
| Serine/threonine-protein phosphatase 2A 55 kDa regulatory subunit B delta isoform (Fragment) | Ppp2r2d | G3UXS9 | 1 |
| Serine/threonine-protein phosphatase 2A 65 kDa regulatory subunit A alpha isoform (Fragment) | Ppp2r1a | G3UWL2 | 1 |
| Serine/threonine-protein phosphatase 2A 65 kDa regulatory subunit A beta isoform | Ppp2r1b | H3BIV7 | 1 |
| Serine/threonine-protein phosphatase 2A 65 kDa regulatory subunit A beta isoform | Ppp2r1b | H3BLE7 | 1 |
| Serine/threonine-protein phosphatase 2A regulatory subunit B'' subunit delta | Ppp2r3d | J3QNX1 | 1 |
| Serine/threonine-protein phosphatase 2A regulatory subunit B'' subunit delta (Fragment) | Ppp2r3d | J3QPX4 | 1 |
| Serine/threonine-protein phosphatase 2B catalytic subunit gamma isoform (EC 3.1.3.16) (CAM-PRP catalytic subunit) (Calcineurin, testis-specific catalytic subunit) (Calmodulin-dependent calcineurin A subunit gamma isoform) | Ppp3cc Calnc | P48455 | 1 |
| Serine/threonine-protein phosphatase 4 regulatory subunit 1 | Ppp4r1 | E9PX53 | 1 |
| Serine/threonine-protein phosphatase 4 regulatory subunit 1 | Ppp4r1 | E9QPR5 | 1 |
| Serine/threonine-protein phosphatase 4 regulatory subunit 1 | Ppp4r1 | E0CXK8 | 1 |
| Serine/threonine-protein phosphatase 4 regulatory subunit 1 (Fragment) | Ppp4r1 | E0CYV2 | 1 |
| Serine/threonine-protein phosphatase 4 regulatory subunit 1 (Fragment) | Ppp4r1 | F6TLH3 | 1 |
| Serine/threonine-protein phosphatase CPPED1 (Fragment) | Cpped1 | D3Z7F7 | 1 |
| Serpin B8 | Serpinb8 | O08800 | 1 |
| Serum amyloid A-2 protein [Cleaved into: Amyloid protein A (Amyloid fibril protein AA)] | Saa2 | P05367 | 1 |
| Serum paraoxonase/lactonase 3 (EC 3.1.1.2) (EC 3.1.1.81) (EC 3.1.8.1) | Pon3 | Q62087 | 1 |
| SET domain-containing 1A | Setd1a | E9PYH6 | 1 |
| SET-binding factor 2 | Sbf2 | E9PXF8 | 1 |
| SET-binding factor 2 | Sbf2 | E9Q305 | 1 |
| SET-binding factor 2 | Sbf2 | E9Q372 | 1 |
| SH2 domain-containing protein 1A (Signaling lymphocytic activation molecule-associated protein) (SLAM-associated protein) (T-cell signal transduction molecule SAP) | Sh2d1a Xlp | O88890 | 1 |
| SH3 and multiple ankyrin repeat domains protein 1 (Shank1) | Shank1 | D3YZU1 | 1 |
| SH3 and multiple ankyrin repeat domains protein 3 (Shank3) (Proline-rich synapse-associated protein 2) (ProSAP2) (SPANK-2) | Shank3 Kiaa1650 Prosap2 | Q4ACU6 | 1 |