| Lysine-specific demethylase 6A (EC 1.14.11.-) (Histone demethylase UTX) (Ubiquitously-transcribed TPR protein on the X chromosome) (Ubiquitously-transcribed X chromosome tetratricopeptide repeat protein) | KDM6A UTX | O15550 | 1 |
| LysM and putative peptidoglycan-binding domain-containing protein 2 | LYSMD2 | Q8IV50 | 1 |
| Lysophosphatidic acid phosphatase type 6 (EC 3.1.3.2) (Acid phosphatase 6, lysophosphatidic) (Acid phosphatase-like protein 1) (PACPL1) | ACP6 ACPL1 LPAP UNQ205/PRO231 | Q9NPH0 | 1 |
| Lysophosphatidic acid receptor 5 (LPA receptor 5) (LPA-5) (G-protein coupled receptor 92) (G-protein coupled receptor 93) | LPAR5 GPR92 GPR93 | Q9H1C0 | 1 |
| Lysophosphatidic acid receptor 6 (LPA receptor 6) (LPA-6) (Oleoyl-L-alpha-lysophosphatidic acid receptor) (P2Y purinoceptor 5) (P2Y5) (Purinergic receptor 5) (RB intron encoded G-protein coupled receptor) | LPAR6 P2RY5 | P43657 | 1 |
| Lysophospholipid acyltransferase 1 (LPLAT 1) (EC 2.3.1.-) (1-acylglycerophosphoserine O-acyltransferase) (EC 2.3.1.n6) (Lysophosphatidylserine acyltransferase) (LPSAT) (Lyso-PS acyltransferase) (Membrane-bound O-acyltransferase domain-containing protein 1) (O-acyltransferase domain-containing protein 1) | MBOAT1 OACT1 | Q6ZNC8 | 1 |
| Lysosomal acid phosphatase | ACP2 | E9PKW9 | 1 |
| Lysosomal acid phosphatase | ACP2 | E9PQY3 | 1 |
| Lysosomal acid phosphatase (cDNA FLJ51107, highly similar to Lysosomal acid phosphatase (EC 3.1.3.2)) | ACP2 | B7Z6U3 | 1 |
| Lysosomal acid phosphatase (Fragment) | ACP2 | E9PP23 | 1 |
| Lysosomal acid phosphatase (LAP) (EC 3.1.3.2) | ACP2 | Q561W5 | 1 |
| Lysosomal alpha-glucosidase (EC 3.2.1.20) (Acid maltase) (Aglucosidase alfa) [Cleaved into: 76 kDa lysosomal alpha-glucosidase; 70 kDa lysosomal alpha-glucosidase] | GAA | Q14351 | 1 |
| Lysosomal alpha-mannosidase (Fragment) | MAN2B1 | M0R174 | 1 |
| Lysosomal Pro-X carboxypeptidase (EC 3.4.16.2) (Angiotensinase C) (Lysosomal carboxypeptidase C) (Proline carboxypeptidase) (Prolylcarboxypeptidase) (PRCP) | PRCP PCP | B3KRK5 | 1 |
| Lysosomal-associated transmembrane protein 4B (Fragment) | LAPTM4B | H0YBN1 | 1 |
| Lysosome membrane protein 2 (85 kDa lysosomal membrane sialoglycoprotein) (LGP85) (CD36 antigen-like 2) (Lysosome membrane protein II) (LIMP II) (Scavenger receptor class B member 2) (CD antigen CD36) | SCARB2 CD36L2 LIMP2 LIMPII | E7EM68 | 1 |
| Lysosome-associated membrane glycoprotein 2 (Fragment) | LAMP2 | H0YCG2 | 1 |
| Lysozyme-like protein 6 (EC 3.2.1.17) | LYZL6 LYC1 UNQ754/PRO1485 | O75951 | 1 |
| LYST-interacting protein LIP5 (Fragment) | 0 | Q9C063 | 1 |
| Lysyl oxidase homolog 1 (EC 1.4.3.-) (Lysyl oxidase-like protein 1) (LOL) | LOXL1 LOXL | Q96BW7 | 1 |
| Lysyl oxidase homolog 2 (Fragment) | LOXL2 | H0YAP6 | 1 |
| Lysyl oxidase homolog 2 (Fragment) | LOXL2 | E5RI22 | 1 |
| Lysyl oxidase homolog 2 (Fragment) | LOXL2 | E5RFY0 | 1 |
| Lysyl oxidase homolog 2 (Fragment) | LOXL2 | H0YAR1 | 1 |
| Lysyl oxidase homolog 4 (EC 1.4.3.-) (Lysyl oxidase-like protein 4) (Lysyl oxidase-related protein C) | LOXL4 LOXC | Q96PC0 | 1 |
| M-phase inducer phosphatase 1 (EC 3.1.3.48) (Dual specificity phosphatase Cdc25A) | CDC25A | P30304 | 1 |
| M-phase inducer phosphatase 2 | CDC25B | G8JLH2 | 1 |
| M-phase inducer phosphatase 2 (EC 3.1.3.48) (Dual specificity phosphatase Cdc25B) | CDC25B CDC25HU2 | P30305 | 1 |
| M-phase phosphoprotein 9 | MPHOSPH9 | F5H798 | 1 |
| Macoilin (Transmembrane protein 57) | TMEM57 | Q8N5G2 | 1 |
| Macrophage colony-stimulating factor 1 (Fragment) | CSF1 | E9PJA2 | 1 |
| Macrophage erythroblast attacher, isoform CRA_b | MAEA hCG_1646851 | D3DVP1 | 1 |
| Macrophage migration inhibitory factor (Fragment) | MIF | I4AY87 | 1 |
| Macrophage receptor MARCO (Fragment) | MARCO | C9JKT8 | 1 |
| Macrophage-capping protein (Actin regulatory protein CAP-G) | CAPG AFCP MCP | B8ZZS7 | 1 |
| Macrophage-expressed gene 1 protein (Macrophage gene 1 protein) (Mpg-1) | MPEG1 | Q2M385 | 1 |
| MAD2L1-binding protein (Caught by MAD2 protein) | MAD2L1BP CMT2 KIAA0110 | Q15013 | 1 |
| Maestro heat-like repeat family member 5 | MROH5 | Q6ZUA9 | 1 |
| Maestro heat-like repeat-containing protein family member 6 | MROH6 C8orf73 | A6NGR9 | 1 |
| Maestro heat-like repeat-containing protein family member 9 | MROH9 C1orf129 | F5GWX6 | 1 |
| MAGE-like protein 2 (Necdin-like protein 1) (Protein nM15) | MAGEL2 NDNL1 | Q9UJ55 | 1 |
| MAGEL2 protein (Fragment) | MAGEL2 | Q05BN9 | 1 |
| Magnesium transporter NIPA3 (NIPA-like protein 1) (Non-imprinted in Prader-Willi/Angelman syndrome region protein 3) | NIPAL1 NIPA3 NPAL1 | Q6NVV3 | 1 |
| Magnesium transporter NIPA4 (Ichthyin) (NIPA-like protein 4) (Non-imprinted in Prader-Willi/Angelman syndrome region protein 4) | NIPAL4 ICHN NIPA4 | Q0D2K0 | 1 |
| MAGUK p55 subfamily member 2 (cDNA FLJ52373, highly similar to MAGUK p55 subfamily member 2) | MPP2 | B4DZ84 | 1 |
| MAGUK p55 subfamily member 3 (Discs large homolog 3) (Protein MPP3) | MPP3 DLG3 | Q13368 | 1 |
| MAGUK p55 subfamily member 3 (Membrane protein, palmitoylated 3 (MAGUK p55 subfamily member 3), isoform CRA_a) | MPP3 hCG_28215 | D3DX46 | 1 |
| MAGUK p55 subfamily member 4 (Amyotrophic lateral sclerosis 2 chromosomal region candidate gene 5 protein) (Discs large homolog 6) | MPP4 ALS2CR5 DLG6 | Q96JB8 | 1 |
| MAGUK p55 subfamily member 5 (Fragment) | MPP5 | G3V2H1 | 1 |
| MAGUK p55 subfamily member 6 (Fragment) | MPP6 | C9J4Q3 | 1 |
| MAGUK p55 subfamily member 6 (Fragment) | MPP6 | C9JGI8 | 1 |
| Major facilitator superfamily domain-containing protein 1 (Fragment) | MFSD1 | H7C5U3 | 1 |
| Major facilitator superfamily domain-containing protein 10 | MFSD10 | D6RE79 | 1 |
| Major facilitator superfamily domain-containing protein 2B | MFSD2B | A6NFX1 | 1 |
| Major prion protein | PRNP | O75942 | 1 |
| Male-specific lethal 1 homolog | MSL1 | J3KSZ8 | 1 |
| Male-specific lethal 1 homolog (MSL-1) (Male-specific lethal 1-like 1) (MSL1-like 1) (Male-specific lethal-1 homolog 1) | MSL1 MSL1L1 | Q68DK7 | 1 |
| Maleylacetoacetate isomerase | GSTZ1 | A0A0A0MR33 | 1 |
| Maleylacetoacetate isomerase (Fragment) | GSTZ1 | H0YJN8 | 1 |
| Malic enzyme | 0 | A8K168 | 1 |
| Malic enzyme (Fragment) | ME3 | E9PMB9 | 1 |
| MAM domain-containing glycosylphosphatidylinositol anchor protein 2 | MDGA2 | A0A0A0MSW6 | 1 |
| Mammary dihydrolipoamide acetyltransferase, mature sequence (EC 2.3.1.12) (Fragment) | 0 | Q16791 | 1 |
| Mannan-binding lectin serine protease 1 | MASP1 | F8W876 | 1 |
| Mannose-6-phosphate isomerase | MPI | H3BMZ9 | 1 |
| Mannose-6-phosphate isomerase (EC 5.3.1.8) | MPI hCG_2006995 | H3BPB8 | 1 |
| Mannose-6-phosphate isomerase (EC 5.3.1.8) (Fragment) | MPI | H3BP57 | 1 |
| Mannose-6-phosphate isomerase (Fragment) | MPI | H3BU66 | 1 |
| Mannose-binding protein C (MBP-C) (Collectin-1) (MBP1) (Mannan-binding protein) (Mannose-binding lectin) | MBL2 COLEC1 MBL | Q5SQS3 | 1 |
| Mannose-P-dolichol utilization defect 1 protein | MPDU1 | J3KSI4 | 1 |
| Mannosyl (Alpha-1,3-)-glycoprotein beta-1,2-N-acetylglucosaminyltransferase variant (Fragment) | 0 | Q59G70 | 1 |
| Mannosyl-oligosaccharide 1,2-alpha-mannosidase IA (EC 3.2.1.113) (Man(9)-alpha-mannosidase) (Man9-mannosidase) (Mannosidase alpha class 1A member 1) (Processing alpha-1,2-mannosidase IA) (Alpha-1,2-mannosidase IA) | MAN1A1 | Q6P052 | 1 |
| Mannosyl-oligosaccharide 1,2-alpha-mannosidase IA (EC 3.2.1.113) (Man(9)-alpha-mannosidase) (Man9-mannosidase) (Mannosidase alpha class 1A member 1) (Processing alpha-1,2-mannosidase IA) (Alpha-1,2-mannosidase IA) | MAN1A1 | Q9NU44 | 1 |
| Mannosyltransferase (EC 2.4.1.-) | 0 | A0A087WZ62 | 1 |
| MAP kinase-activated protein kinase 5 (Fragment) | MAPKAPK5 | R4GN33 | 1 |
| MAP kinase-activating death domain protein | MADD | A0A0A0MRB5 | 1 |
| MAP kinase-activating death domain protein (Differentially expressed in normal and neoplastic cells) (Insulinoma glucagonoma clone 20) (Rab3 GDP/GTP exchange factor) | MADD DENN IG20 KIAA0358 | B5MEE5 | 1 |
| MAP kinase-activating death domain protein (Fragment) | MADD | C9JM97 | 1 |
| MAP kinase-interacting serine/threonine-protein kinase 1 | MKNK1 | E9PQ26 | 1 |
| MAP/microtubule affinity-regulating kinase 3 (Fragment) | MARK3 | H0YKJ3 | 1 |
| MAP/microtubule affinity-regulating kinase 3 (Fragment) | MARK3 | A2SY06 | 1 |
| MAP/microtubule affinity-regulating kinase 4 (EC 2.7.11.1) (MAP/microtubule affinity-regulating kinase-like 1) | MARK4 KIAA1860 MARKL1 | Q96L34 | 1 |
| MAP6 domain-containing protein 1 (21 kDa STOP-like protein) (SL21) | MAP6D1 | Q9H9H5 | 1 |
| Mapk-regulated corepressor-interacting protein 1 | MCRIP1 | I3L2L5 | 1 |
| MARVEL domain-containing protein 2 (Tricellulin isoform c) | MARVELD2 | A1BQX2 | 1 |
| Mas-related G-protein coupled receptor member X2 | MRGPRX2 MRGX2 | Q96LB1 | 1 |
| Mast cell carboxypeptidase A (MC-CPA) (EC 3.4.17.1) (Carboxypeptidase A3) | CPA3 | P15088 | 1 |
| Maternal embryonic leucine zipper kinase (hMELK) (EC 2.7.11.1) (Protein kinase Eg3) (pEg3 kinase) (Protein kinase PK38) (hPK38) (Tyrosine-protein kinase MELK) (EC 2.7.10.2) | MELK KIAA0175 | Q14680 | 1 |
| Matrilin-2 (Fragment) | MATN2 | H0YBU5 | 1 |
| Matrix metalloproteinase (EC 3.4.24.-) (Fragment) | MMP10 | F5GYX7 | 1 |
| Matrix metalloproteinase (EC 3.4.24.-) (Fragment) | MMP14 | F8W1B7 | 1 |
| Matrix metalloproteinase 1 preproprotein variant (Fragment) | 0 | Q53FK3 | 1 |
| Matrix metalloproteinase 7 (Fragment) | MMP7 | A5GZ72 | 1 |
| Matrix metalloproteinase-17 (MMP-17) (EC 3.4.24.-) (Membrane-type matrix metalloproteinase 4) (MT-MMP 4) (MTMMP4) (Membrane-type-4 matrix metalloproteinase) (MT4-MMP) (MT4MMP) | MMP17 MT4MMP | Q9ULZ9 | 1 |
| Matrix metalloproteinase-23 (Fragment) | MMP23B | H0Y6I4 | 1 |
| Matrix metalloproteinase-24 (MMP-24) (EC 3.4.24.-) (Membrane-type matrix metalloproteinase 5) (MT-MMP 5) (MTMMP5) (Membrane-type-5 matrix metalloproteinase) (MT5-MMP) (MT5MMP) [Cleaved into: Processed matrix metalloproteinase-24] | MMP24 MT5MMP | Q9Y5R2 | 1 |
| Matrix metalloproteinase-27 (MMP-27) (EC 3.4.24.-) | MMP27 UNQ2503/PRO5992 | Q9H306 | 1 |
| Matrix remodeling-associated protein 8 (Limitrin) | MXRA8 | B4DE34 | 1 |
| Matrix-remodeling-associated protein 7 | MXRA7 | K7EQX8 | 1 |
| Matrix-remodeling-associated protein 7 | MXRA7 | K7EPS4 | 1 |