| Serine hydroxymethyltransferase, mitochondrial (Fragment) | SHMT2 | H0YIZ0 | 1 |
| Serine incorporator 3 (Fragment) | SERINC3 | Q5H936 | 1 |
| Serine incorporator 3 (Tumor differentially expressed protein 1) | SERINC3 DIFF33 TDE1 SBBI99 | B4DUE9 | 1 |
| Serine incorporator 4 | SERINC4 | A6NH21 | 1 |
| Serine incorporator 5 | SERINC5 | A0A0A0MTB0 | 1 |
| Serine palmitoyltransferase 2 (Fragment) | SPTLC2 | H0YJ96 | 1 |
| Serine palmitoyltransferase 3 (Serine palmitoyltransferase, long chain base subunit 2-like (Aminotransferase 2)) (Fragment) | SPTLC3 SPTLC2L RP5-1077I2.1-002 | B1AKS3 | 1 |
| Serine palmitoyltransferase small subunit A (Small subunit of serine palmitoyltransferase A) (ssSPTa) | SPTSSA C14orf147 SSSPTA | Q969W0 | 1 |
| Serine protease 48 (EC 3.4.21.-) (Epidermis-specific serine protease-like protein) | PRSS48 ESSPL | Q7RTY5 | 1 |
| Serine protease 55 (EC 3.4.21.-) (Testis serine protease 1) (T-SP1) | PRSS55 TSP1 UNQ9391/PRO34284 | Q6UWB4 | 1 |
| Serine protease 56 (EC 3.4.21.-) | PRSS56 | P0CW18 | 1 |
| Serine protease 57 (EC 3.4.21.-) (Neutrophil serine protease 4) (NSP4) (Serine protease 1-like protein 1) | PRSS57 PRSSL1 UNQ782/PRO1599 | Q6UWY2 | 1 |
| Serine protease HTRA1 (Fragment) | HTRA1 | H0Y7G9 | 1 |
| Serine protease HTRA2, mitochondrial (Fragment) | HTRA2 | A0A0C4DG44 | 1 |
| Serine protease inhibitor Kazal-type 2 (Acrosin-trypsin inhibitor) (Epididymis tissue protein Li 172) (HUSI-II) | SPINK2 | P20155 | 1 |
| Serine protease inhibitor Kazal-type 5 (Fragment) | SPINK5 | E7EWP9 | 1 |
| Serine racemase (Fragment) | SRR | I3L3N0 | 1 |
| Serine racemase (Fragment) | SRR | I3L4B4 | 1 |
| Serine--pyruvate aminotransferase (SPT) (EC 2.6.1.51) (Alanine--glyoxylate aminotransferase) (AGT) (EC 2.6.1.44) | AGXT AGT1 SPAT | P21549 | 1 |
| Serine--tRNA ligase, mitochondrial (Seryl-tRNA synthetase 2, isoform CRA_d) | SARS2 hCG_20526 | M0QWZ7 | 1 |
| Serine-protein kinase ATM (Fragment) | ATM | E9PIN0 | 1 |
| Serine-rich coiled-coil domain-containing protein 1 (Fragment) | CCSER1 | H0Y9F8 | 1 |
| Serine/arginine repetitive matrix protein 1 | SRRM1 | M0R1E7 | 1 |
| Serine/arginine repetitive matrix protein 1 | SRRM1 | A9Z1X7 | 1 |
| Serine/arginine repetitive matrix protein 2 (Fragment) | SRRM2 | I3L4U6 | 1 |
| Serine/arginine repetitive matrix protein 3 | SRRM3 | A0A087WXA3 | 1 |
| Serine/arginine-rich splicing factor 12 (35 kDa SR repressor protein) (SRrp35) (Splicing factor, arginine/serine-rich 13B) (Splicing factor, arginine/serine-rich 19) | SRSF12 SFRS13B SFRS19 SRRP35 | Q8WXF0 | 1 |
| Serine/arginine-rich-splicing factor 1 | SRSF1 | J3KSW7 | 1 |
| Serine/arginine-rich-splicing factor 2 (Fragment) | SRSF2 | J3KP15 | 1 |
| Serine/arginine-rich-splicing factor 5 (cDNA FLJ57379, highly similar to Splicing factor, arginine/serine-rich 5) | SRSF5 | B4DJK0 | 1 |
| Serine/arginine-rich-splicing factor 9 (Fragment) | SRSF9 | H0YIB4 | 1 |
| Serine/threonine protein kinase MST4 | MST4 | Q499L9 | 1 |
| Serine/threonine-protein kinase 17A (EC 2.7.11.1) (DAP kinase-related apoptosis-inducing protein kinase 1) | STK17A DRAK1 | Q9UEE5 | 1 |
| Serine/threonine-protein kinase 24 (Fragment) | STK24 | Q5JV99 | 1 |
| Serine/threonine-protein kinase 25 (Fragment) | STK25 | H7C279 | 1 |
| Serine/threonine-protein kinase 25 (Fragment) | STK25 | C9J6L2 | 1 |
| Serine/threonine-protein kinase 32C (EC 2.7.11.1) (PKE) (Yet another novel kinase 3) | STK32C YANK3 | Q86UX6 | 1 |
| Serine/threonine-protein kinase 36 (EC 2.7.11.1) (Fused homolog) | STK36 KIAA1278 | Q9NRP7 | 1 |
| Serine/threonine-protein kinase 38-like | STK38L | F5H0V1 | 1 |
| Serine/threonine-protein kinase 38-like (Fragment) | STK38L | F5GY51 | 1 |
| Serine/threonine-protein kinase 38-like (Fragment) | STK38L | F5H277 | 1 |
| Serine/threonine-protein kinase 40 (EC 2.7.11.1) (SINK-homologous serine/threonine-protein kinase) (Sugen kinase 495) (SgK495) | STK40 SGK495 SHIK | Q8N2I9 | 1 |
| Serine/threonine-protein kinase Chk2 (EC 2.7.11.1) (CHK2 checkpoint homolog) (Cds1 homolog) (Hucds1) (hCds1) (Checkpoint kinase 2) | CHEK2 CDS1 CHK2 RAD53 | O96017 | 1 |
| Serine/threonine-protein kinase DCLK1 | DCLK1 | Q5VZY9 | 1 |
| Serine/threonine-protein kinase DCLK3 (EC 2.7.11.1) (Doublecortin domain-containing protein 3C) (Doublecortin-like and CAM kinase-like 3) (Doublecortin-like kinase 3) | DCLK3 DCAMKL3 DCDC3C KIAA1765 | Q9C098 | 1 |
| Serine/threonine-protein kinase H2 (EC 2.7.11.1) (Protein serine kinase H2) (PSK-H2) | PSKH2 | Q96QS6 | 1 |
| Serine/threonine-protein kinase haspin (EC 2.7.11.1) (Germ cell-specific gene 2 protein) (H-haspin) (Haploid germ cell-specific nuclear protein kinase) | GSG2 | Q8TF76 | 1 |
| Serine/threonine-protein kinase LATS1 (EC 2.7.11.1) (Large tumor suppressor homolog 1) (WARTS protein kinase) (h-warts) | LATS1 WARTS | O95835 | 1 |
| Serine/threonine-protein kinase LMTK1 (EC 2.7.11.1) (Apoptosis-associated tyrosine kinase) (AATYK) (Brain apoptosis-associated tyrosine kinase) (CDK5-binding protein) (Lemur tyrosine kinase 1) (p35-binding protein) (p35BP) | AATK AATYK KIAA0641 LMR1 LMTK1 | Q6ZMQ8 | 1 |
| Serine/threonine-protein kinase LMTK3 (EC 2.7.11.1) (Lemur tyrosine kinase 3) | LMTK3 KIAA1883 TYKLM3 | Q96Q04 | 1 |
| Serine/threonine-protein kinase MRCK alpha | CDC42BPA | A0A0A0MRJ0 | 1 |
| Serine/threonine-protein kinase mTOR | MTOR | B1AKP8 | 1 |
| Serine/threonine-protein kinase Nek3 | NEK3 | F8VTT4 | 1 |
| Serine/threonine-protein kinase Nek5 (EC 2.7.11.1) (Never in mitosis A-related kinase 5) (NimA-related protein kinase 5) | NEK5 | Q6P3R8 | 1 |
| Serine/threonine-protein kinase PAK 1 (Fragment) | PAK1 | H0YCG5 | 1 |
| Serine/threonine-protein kinase PAK 1 (Fragment) | PAK1 | E9PMP2 | 1 |
| Serine/threonine-protein kinase PAK 2 (Fragment) | PAK2 | H7C1X3 | 1 |
| Serine/threonine-protein kinase PAK 3 | PAK3 | A0A087X294 | 1 |
| Serine/threonine-protein kinase PAK 5 (EC 2.7.11.1) (p21-activated kinase 5) (PAK-5) (p21-activated kinase 7) (PAK-7) | PAK5 KIAA1264 PAK7 | Q9P286 | 1 |
| Serine/threonine-protein kinase PAK 6 (EC 2.7.11.1) (PAK-5) (p21-activated kinase 6) (PAK-6) | PAK6 PAK5 | G5E9R2 | 1 |
| Serine/threonine-protein kinase PDIK1L (EC 2.7.11.1) (PDLIM1-interacting kinase 1-like) | PDIK1L CLIK1L | Q8N165 | 1 |
| Serine/threonine-protein kinase pim-1 (EC 2.7.11.1) | PIM1 | P11309 | 1 |
| Serine/threonine-protein kinase PLK4 (EC 2.7.11.21) (Polo-like kinase 4) (PLK-4) (Serine/threonine-protein kinase 18) (Serine/threonine-protein kinase Sak) | PLK4 SAK STK18 | O00444 | 1 |
| Serine/threonine-protein kinase RIO3 (EC 2.7.11.1) (RIO kinase 3) (sudD homolog) | RIOK3 SUDD | O14730 | 1 |
| Serine/threonine-protein kinase RIO3 (Fragment) | RIOK3 | J3QLP4 | 1 |
| Serine/threonine-protein kinase Sgk2 (EC 2.7.11.1) (Serum/glucocorticoid-regulated kinase 2) | SGK2 | Q9HBY8 | 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 L19 | Q9Y2K2 | 1 |
| Serine/threonine-protein kinase SIK3 (Fragment) | SIK3 | H0Y4E8 | 1 |
| Serine/threonine-protein kinase STK11 | STK11 | K7EP59 | 1 |
| Serine/threonine-protein kinase TAO3 (Fragment) | TAOK3 | H0YF68 | 1 |
| Serine/threonine-protein kinase TAO3 (Fragment) | TAOK3 | F5H0M3 | 1 |
| Serine/threonine-protein kinase TNNI3K (EC 2.7.11.1) (Cardiac ankyrin repeat kinase) (Cardiac troponin I-interacting kinase) (TNNI3-interacting kinase) | TNNI3K CARK | Q59H18 | 1 |
| Serine/threonine-protein kinase tousled-like 1 (Tousled-like kinase 1, isoform CRA_b) (cDNA FLJ34656 fis, clone KIDNE2018352, highly similar to Serine/threonine-protein kinase tousled-like 1 (EC 2.7.11.1)) | TLK1 hCG_15833 | B3KRP1 | 1 |
| Serine/threonine-protein kinase tousled-like 2 (Fragment) | TLK2 | J3KRK0 | 1 |
| Serine/threonine-protein kinase ULK3 (EC 2.7.11.1) (Unc-51-like kinase 3) | ULK3 | B4DFT0 | 1 |
| Serine/threonine-protein kinase ULK4 (EC 2.7.11.1) (Unc-51-like kinase 4) | ULK4 | Q96C45 | 1 |
| Serine/threonine-protein kinase WNK1 | WNK1 | F5GWT4 | 1 |
| Serine/threonine-protein kinase WNK1 | WNK1 | F6UYG0 | 1 |
| Serine/threonine-protein kinase WNK2 | WNK2 | E9PCD1 | 1 |
| Serine/threonine-protein kinase WNK2 (Fragment) | WNK2 | H0Y7R3 | 1 |
| Serine/threonine-protein kinase WNK2 (Fragment) | WNK2 | H0Y493 | 1 |
| Serine/threonine-protein kinase WNK4 (EC 2.7.11.1) (Protein kinase lysine-deficient 4) (Protein kinase with no lysine 4) | WNK4 PRKWNK4 | B0LPI0 | 1 |
| Serine/threonine-protein phosphatase (EC 3.1.3.16) | 0 | B7ZB67 | 1 |
| Serine/threonine-protein phosphatase (EC 3.1.3.16) | PPP2CA hCG_16586 | B3KUN1 | 1 |
| Serine/threonine-protein phosphatase (EC 3.1.3.16) (Fragment) | 0 | Q53FR0 | 1 |
| Serine/threonine-protein phosphatase (EC 3.1.3.16) (Fragment) | PPP6C | Q5T1S7 | 1 |
| Serine/threonine-protein phosphatase (EC 3.1.3.16) (Fragment) | PPP1CB | E7ETD8 | 1 |
| Serine/threonine-protein phosphatase (EC 3.1.3.16) (Fragment) | PPP2CA | E7ESG8 | 1 |
| Serine/threonine-protein phosphatase (EC 3.1.3.16) (Fragment) | PPP2CA | E5RHP4 | 1 |
| Serine/threonine-protein phosphatase (EC 3.1.3.16) (Fragment) | PPP2CB | E5RHC1 | 1 |
| Serine/threonine-protein phosphatase 2A 55 kDa regulatory subunit B beta isoform (Fragment) | PPP2R2B | D6RGF9 | 1 |
| Serine/threonine-protein phosphatase 2A 55 kDa regulatory subunit B gamma isoform (IMYPNO1) (PP2A subunit B isoform B55-gamma) (PP2A subunit B isoform PR55-gamma) (PP2A subunit B isoform R2-gamma) (PP2A subunit B isoform gamma) | PPP2R2C | Q9Y2T4 | 1 |
| Serine/threonine-protein phosphatase 2A 56 kDa regulatory subunit beta isoform (PP2A B subunit isoform B'-beta) (PP2A B subunit isoform B56-beta) (PP2A B subunit isoform PR61-beta) (PP2A B subunit isoform R5-beta) | PPP2R5B | Q15173 | 1 |
| Serine/threonine-protein phosphatase 2A 56 kDa regulatory subunit delta isoform | PPP2R5D | E9PFR3 | 1 |
| Serine/threonine-protein phosphatase 2A 56 kDa regulatory subunit delta isoform (Fragment) | PPP2R5D | H7C5Q9 | 1 |
| Serine/threonine-protein phosphatase 2A 56 kDa regulatory subunit gamma isoform (Fragment) | PPP2R5C | H0YK26 | 1 |
| Serine/threonine-protein phosphatase 2A 56 kDa regulatory subunit gamma isoform (Fragment) | PPP2R5C | H0YJ75 | 1 |
| Serine/threonine-protein phosphatase 2A 65 kDa regulatory subunit A alpha isoform (Fragment) | PPP2R1A | E9PH38 | 1 |
| Serine/threonine-protein phosphatase 2A 65 kDa regulatory subunit A beta isoform (Fragment) | PPP2R1B | H0YDG7 | 1 |
| Serine/threonine-protein phosphatase 2A 65 kDa regulatory subunit A beta isoform (PP2A subunit A isoform PR65-beta) (PP2A subunit A isoform R1-beta) | PPP2R1B | B4DGQ6 | 1 |