| Max dimerization protein 3 (Max dimerizer 3) (Class C basic helix-loop-helix protein 13) (bHLHc13) (Max-associated protein 3) (Max-interacting transcriptional repressor MAD3) (Myx) | MXD3 BHLHC13 MAD3 | Q9BW11 | 1 |
| Max dimerization protein 4 (Max dimerizer 4) (Class C basic helix-loop-helix protein 12) (bHLHc12) (Max-associated protein 4) (Max-interacting transcriptional repressor MAD4) | MXD4 BHLHC12 MAD4 | Q14582 | 1 |
| MAX gene-associated protein (Fragment) | MGA | H3BTN2 | 1 |
| Max-like protein X (Class D basic helix-loop-helix protein 13) (bHLHd13) (Max-like bHLHZip protein) (Protein BigMax) (Transcription factor-like protein 4) | MLX BHLHD13 TCFL4 | Q9UH92 | 1 |
| MBT domain-containing protein 1 | MBTD1 | Q05BQ5 | 1 |
| Mdm2-binding protein (hMTBP) | MTBP | Q96DY7 | 1 |
| Meckel syndrome type 1 protein (Fragment) | MKS1 | J3QQP4 | 1 |
| Mediator complex subunit 22 (Mediator of RNA polymerase II transcription subunit 22) (Fragment) | MED22 RP11-244N20.9-005 | Q5T8T8 | 1 |
| Mediator of RNA polymerase II transcription subunit 12-like protein (Mediator complex subunit 12-like protein) (Thyroid hormone receptor-associated-like protein) (Trinucleotide repeat-containing gene 11 protein-like) | MED12L KIAA1635 TNRC11L TRALP TRALPUSH PRO0314 | Q86YW9 | 1 |
| Mediator of RNA polymerase II transcription subunit 13 (Fragment) | MED13L | H0YIQ9 | 1 |
| Mediator of RNA polymerase II transcription subunit 15 | MED15 | F8WEJ4 | 1 |
| Mediator of RNA polymerase II transcription subunit 15 (Fragment) | MED15 | C9JGN2 | 1 |
| Mediator of RNA polymerase II transcription subunit 15 (Mediator complex subunit 15) (Fragment) | MED15 | C9JM58 | 1 |
| Mediator of RNA polymerase II transcription subunit 19 (Lung cancer metastasis-related protein 1) (Mediator complex subunit 19) | MED19 LCMR1 | A0JLT2 | 1 |
| Mediator of RNA polymerase II transcription subunit 20 (Fragment) | MED20 | B7ZBQ1 | 1 |
| Mediator of RNA polymerase II transcription subunit 24 (Fragment) | MED24 | J3KSL1 | 1 |
| Mediator of RNA polymerase II transcription subunit 25 (Activator interaction domain-containing protein 1) (Activator-recruited cofactor 92 kDa component) (ARC92) (Mediator complex subunit 25) (p78) | MED25 ACID1 ARC92 PTOV2 TCBAP0758 | Q71SY5 | 1 |
| Mediator of RNA polymerase II transcription subunit 28 (Endothelial-derived protein 1) (Mediator complex subunit 28) (Merlin and Grb2-interacting cytoskeletal protein) (Magicin) (Tumor angiogenesis marker EG-1) | MED28 EG1 FKSG20 | Q9H204 | 1 |
| Mediator of RNA polymerase II transcription subunit 7 (hMED7) (Activator-recruited cofactor 34 kDa component) (ARC34) (Cofactor required for Sp1 transcriptional activation subunit 9) (CRSP complex subunit 9) (Mediator complex subunit 7) (RNA polymerase transcriptional regulation mediator subunit 7 homolog) (Transcriptional coactivator CRSP33) | MED7 ARC34 CRSP9 | O43513 | 1 |
| Medium-chain-specific acyl-CoA dehydrogenase, mitochondrial | ACADM | E9PQA8 | 1 |
| Medium-wave-sensitive opsin 1 (Green cone photoreceptor pigment) (Green-sensitive opsin) (GOP) | OPN1MW GCP | P04001 | 1 |
| Megakaryocyte-associated tyrosine-protein kinase (Fragment) | MATK | K7ENL8 | 1 |
| Meiosis inhibitor protein 1 | MEI1 | F5GZT0 | 1 |
| Meiosis regulator and mRNA stability factor 1 (Limkain-b1) (Meiosis arrest female protein 1) | MARF1 KIAA0430 LKAP | Q9Y4F3 | 1 |
| Meiosis-specific coiled-coil domain-containing protein MEIOC (Fragment) | MEIOC | C9J4A2 | 1 |
| Meiosis-specific coiled-coil domain-containing protein MEIOC (Meiosis-specific with coiled-coil domain protein) | MEIOC C17orf104 | A2RUB1 | 1 |
| Meiosis-specific kinetochore protein | MEIKIN | A0A087WXM9 | 1 |
| Meiotic nuclear division protein 1 homolog | MND1 | D6R9E3 | 1 |
| Meiotic nuclear division protein 1 homolog | MND1 | D6RIA0 | 1 |
| Melanocyte-stimulating hormone receptor (MSH-R) (Melanocortin receptor 1) | 0 | A8I0M1 | 1 |
| Melanocyte-stimulating hormone receptor (MSH-R) (Melanocortin receptor 1) (MC1-R) | MC1R MSHR | Q01726 | 1 |
| Melanoma inhibitory activity protein 2 | MIA2 | Q96PC5 | 1 |
| Melanoma-associated antigen 2 (Cancer/testis antigen 1.2) (CT1.2) (MAGE-2 antigen) | MAGEA2 MAGE2 MAGEA2A; MAGEA2B MAGE2 MAGEA2 | P43356 | 1 |
| Melanoma-associated antigen B10 (MAGE-B10 antigen) | MAGEB10 | Q96LZ2 | 1 |
| Melanoma-associated antigen D4 (Fragment) | MAGED4B | H0Y8Z3 | 1 |
| Melanoma-associated antigen E2 (Hepatocellular carcinoma-associated protein 3) (MAGE-E2 antigen) | MAGEE2 HCA3 | Q8TD90 | 1 |
| Melanoma-associated antigen H1 (Apoptosis-related protein 1) (APR-1) (MAGE-H1 antigen) (Restin) | MAGEH1 APR1 | Q9H213 | 1 |
| Melanophilin (Fragment) | MLPH | C9JKV5 | 1 |
| Melanotransferrin (Fragment) | MELTF | C9JVN1 | 1 |
| Membrane progestin receptor delta (mPR delta) (Membrane progesterone P4 receptor delta) (Membrane progesterone receptor delta) (Progesterone and adipoQ receptor family member 6) (Progestin and adipoQ receptor family member 6) | PAQR6 | Q6TCH4 | 1 |
| Membrane protein FAM174B | FAM174B | H3BTJ4 | 1 |
| Membrane protein, palmitoylated 5 (MAGUK p55 subfamily member 5) | MPP5 | Q4VBP4 | 1 |
| Membrane-associated phosphatidylinositol transfer protein 1 (Fragment) | PITPNM1 | E9PMZ6 | 1 |
| Membrane-associated phosphatidylinositol transfer protein 1 (Fragment) | PITPNM1 | E9PNU6 | 1 |
| Membrane-associated tyrosine- and threonine-specific cdc2-inhibitory kinase (cDNA FLJ60243, highly similar to Membrane-associated tyrosine- and threonine-specific cdc2-inhibitory kinase (EC 2.7.11.1)) | PKMYT1 | A6NHV6 | 1 |
| Membrane-associated tyrosine- and threonine-specific cdc2-inhibitory kinase (cDNA FLJ61000, highly similar to Membrane-associated tyrosine- andthreonine-specific cdc2-inhibitory kinase (EC 2.7.11.1)) | PKMYT1 | B4DZM6 | 1 |
| Membrane-bound transcription factor site-1 protease (Fragment) | MBTPS1 | H3BV53 | 1 |
| Membrane-spanning 4-domains subfamily A member 13 (Testis-expressed transmembrane protein 4) | MS4A13 | Q5J8X5 | 1 |
| Membrane-spanning 4-domains subfamily A member 7 (CD20 antigen-like 4) (CD20/FC-epsilon-RI-beta family member 4) (Four-span transmembrane protein 2) | MS4A7 4SPAN2 CD20L4 CFFM4 | Q9GZW8 | 1 |
| Meprin A subunit (EC 3.4.24.-) (Endopeptidase-2) | MEP1B hCG_25081 | J3QKX5 | 1 |
| Meprin A subunit beta (EC 3.4.24.63) (Endopeptidase-2) (Meprin B) (N-benzoyl-L-tyrosyl-P-amino-benzoic acid hydrolase subunit beta) (PABA peptide hydrolase) (PPH beta) | MEP1B | Q16820 | 1 |
| Mesoderm induction early response protein 1 (Early response 1) (Er1) (Mi-er1) (hMi-er1) | MIER1 KIAA1610 | Q8N108 | 1 |
| Mesoderm specific transcript homolog (Mouse) (Mesoderm specific transcript homolog (Mouse), isoform CRA_a) | MEST hCG_18967 tcag7.331 | A4D1L9 | 1 |
| Mesothelin (Fragment) | MSLN | H3BUX1 | 1 |
| Mesothelin (Fragment) | MSLN | H3BMA1 | 1 |
| Metabotropic glutamate receptor 2 (mGluR2) | GRM2 GPRC1B MGLUR2 | Q14416 | 1 |
| Metabotropic glutamate receptor 3 (Fragment) | GRM3 | C9J2I2 | 1 |
| Metabotropic glutamate receptor 3 (mGluR3) | GRM3 GPRC1C MGLUR3 | Q14832 | 1 |
| Metabotropic glutamate receptor 6 (mGluR6) | GRM6 GPRC1F MGLUR6 | O15303 | 1 |
| Metabotropic glutamate receptor 7 (Fragment) | GRM7 | C9JU97 | 1 |
| Metal regulatory transcription factor 1 (MRE-binding transcription factor) (Transcription factor MTF-1) | MTF1 | Q14872 | 1 |
| Metalloendopeptidase (EC 3.4.24.-) | TLL1 | B7ZLW3 | 1 |
| Metallophosphoesterase 1 (EC 3.1.-.-) (Post-GPI attachment to proteins factor 5) | MPPE1 PGAP5 PP579 | Q53F39 | 1 |
| Metalloprotease TIKI1 (EC 3.4.-.-) (TRAB domain-containing protein 2A) | TRABD2A C2orf89 TIKI1 | Q86V40 | 1 |
| Metalloproteinase inhibitor 1 (Fragment) | TIMP1 | Q5H9B4 | 1 |
| Metalloreductase STEAP1 (Fragment) | STEAP1 | H7C0D8 | 1 |
| Metalloreductase STEAP2 (Fragment) | STEAP2 | C9JLP2 | 1 |
| Metallothionein | 0 | Q8TDC4 | 1 |
| Metallothionein | MT1F | H3BRY8 | 1 |
| Metallothionein | MT1H | H3BTC4 | 1 |
| Metallothionein | MT1B | H3BR34 | 1 |
| Metallothionein-1L (MT-1L) (Metallothionein-IL) (MT-IL) | MT1L | Q93083 | 1 |
| Metallothionein-3 | MT3 | H3BPK2 | 1 |
| Metastasis-associated protein MTA3 | MTA3 | E7EQY4 | 1 |
| Metaxin 1, isoform CRA_b (Metaxin-1) | MTX1 hCG_1997325 | A0A0A0MRK6 | 1 |
| Meteorin | METRN | H3BSC8 | 1 |
| Methionine aminopeptidase 2 (MAP 2) (MetAP 2) (EC 3.4.11.18) (Initiation factor 2-associated 67 kDa glycoprotein) (Peptidase M) (p67) (p67eIF2) | METAP2 | F8VQZ7 | 1 |
| Methionine aminopeptidase 2 (MAP 2) (MetAP 2) (EC 3.4.11.18) (Initiation factor 2-associated 67 kDa glycoprotein) (Peptidase M) (p67) (p67eIF2) | METAP2 | F8VRR3 | 1 |
| Methionine synthase (Fragment) | MTR | B1ANE3 | 1 |
| Methionine--tRNA ligase, cytoplasmic | MARS | F8VPL7 | 1 |
| Methionine--tRNA ligase, cytoplasmic | MARS | F8VS26 | 1 |
| Methionine--tRNA ligase, cytoplasmic (Fragment) | MARS | H0YHV5 | 1 |
| Methionine--tRNA ligase, mitochondrial (EC 6.1.1.10) (Methionyl-tRNA synthetase 2) (Mitochondrial methionyl-tRNA synthetase) (MtMetRS) | MARS2 | Q96GW9 | 1 |
| Methionine-R-sulfoxide reductase B1 (MsrB1) (EC 1.8.4.-) (Selenoprotein X) (SelX) | MSRB1 SEPX1 HSPC270 | Q9NZV6 | 1 |
| Methyl-CpG binding domain protein 3, isoform CRA_b (Methyl-CpG-binding domain protein 3) | MBD3 hCG_22692 | K7EIE8 | 1 |
| Methyl-CpG-binding domain protein 3-like 1 (MBD3-like protein 1) | MBD3L1 MBD3L | Q8WWY6 | 1 |
| Methyl-CpG-binding domain protein 4 (EC 3.2.2.-) (Methyl-CpG-binding endonuclease 1) (Methyl-CpG-binding protein MBD4) (Mismatch-specific DNA N-glycosylase) | MBD4 MED1 | O95243 | 1 |
| Methyl-CpG-binding domain protein 5 (Methyl-CpG-binding protein MBD5) | MBD5 KIAA1461 | Q9P267 | 1 |
| Methyl-CpG-binding protein 2 | MECP2 | H7BY72 | 1 |
| Methylcrotonoyl-CoA carboxylase beta chain, mitochondrial (Fragment) | MCCC2 | D6RD67 | 1 |
| Methylcrotonoyl-CoA carboxylase subunit alpha, mitochondrial | MCCC1 | F5GYT8 | 1 |
| Methylcytosine dioxygenase TET2 (EC 1.14.11.n2) | TET2 KIAA1546 Nbla00191 | Q6N021 | 1 |
| Methylenetetrahydrofolate reductase (EC 1.5.1.20) | MTHFR | Q5SNW6 | 1 |
| Methylmalonyl-CoA epimerase, mitochondrial (Fragment) | MCEE | H7BZS7 | 1 |
| Methylosome subunit pICln | CLNS1A | E9PJF4 | 1 |
| Methylthioribulose-1-phosphate dehydratase | APIP | S4R3D6 | 1 |
| Methyltransferase-like protein 13 (EC 2.1.1.-) | METTL13 KIAA0859 CGI-01 | Q53EZ6 | 1 |
| Methyltransferase-like protein 17, mitochondrial (EC 2.1.1.-) (False p73 target gene protein) (Methyltransferase 11 domain-containing protein 1) (Protein RSM22 homolog, mitochondrial) | METTL17 METT11D1 | Q9H7H0 | 1 |
| Methyltransferase-like protein 24 (EC 2.1.1.-) | METTL24 C6orf186 | Q5JXM2 | 1 |
| Methyltransferase-like protein 6 (EC 2.1.1.-) | METTL6 | Q8TCB7 | 1 |