| Kinesin-like protein KIF9 | KIF9 | Q9HAQ2 | 3 |
| Kinetochore-associated protein NSL1 homolog | NSL1 C1orf48 DC31 DC8 MIS14 | Q96IY1 | 3 |
| KIT protein (Fragment) | KIT | Q8TCG9 | 3 |
| Krueppel-like factor 4 (Epithelial zinc finger protein EZF) (Gut-enriched krueppel-like factor) | KLF4 EZF GKLF | O43474 | 3 |
| Kunitz-type protease inhibitor 1 (Fragment) | SPINT1 | H3BMB6 | 3 |
| Kynurenine formamidase (KFA) (KFase) (EC 3.5.1.9) (Arylformamidase) (N-formylkynurenine formamidase) (FKF) | AFMID | Q63HM1 | 3 |
| L-lactate dehydrogenase A chain | LDHA | F5H5J4 | 3 |
| L-lactate dehydrogenase A chain (Fragment) | LDHA | F5GXH2 | 3 |
| L-lactate dehydrogenase A chain (Fragment) | LDHA | F5GXY2 | 3 |
| L-serine dehydratase/L-threonine deaminase (SDH) (EC 4.3.1.17) (L-serine deaminase) (L-threonine dehydratase) (TDH) (EC 4.3.1.19) | SDS SDH | P20132 | 3 |
| La-related protein 1B (La ribonucleoprotein domain family member 1B) (La ribonucleoprotein domain family member 2) (La-related protein 2) | LARP1B LARP2 | Q659C4 | 3 |
| La-related protein 7 (Fragment) | LARP7 | H0YA82 | 3 |
| Lactadherin | MFGE8 | X6R3G6 | 3 |
| Lactoferrin | 0 | Q2TUW9 | 3 |
| Ladinin-1 (Fragment) | LAD1 | H0Y901 | 3 |
| Laminin subunit beta-1 | LAMB1 | E7EPA6 | 3 |
| Lanosterol synthase (EC 5.4.99.7) (2,3-epoxysqualene--lanosterol cyclase) (Oxidosqualene--lanosterol cyclase) (OSC) (hOSC) | LSS OSC | B4DJZ9 | 3 |
| LARGE xylosyl- and glucuronyltransferase 1 (EC 2.4.-.-) (Acetylglucosaminyltransferase-like 1A) (Glycosyltransferase-like protein) [Includes: Xylosyltransferase LARGE (EC 2.4.2.-); Beta-1,3-glucuronyltransferase LARGE (EC 2.4.1.-)] | LARGE1 KIAA0609 LARGE | O95461 | 3 |
| Leptin receptor overlapping transcript-like 1 (Endospanin-2) | LEPROTL1 My047 UNQ577/PRO1139 | O95214 | 3 |
| Lethal(2) giant larvae protein homolog 1 | LLGL1 | A0A087WW77 | 3 |
| Leucine-rich repeat and fibronectin type III domain-containing protein 1 (Synaptic adhesion-like molecule 2) | LRFN1 KIAA1484 SALM2 | Q9P244 | 3 |
| Leucine-rich repeat and fibronectin type-III domain-containing protein 2 (Synaptic adhesion-like molecule 1) | LRFN2 KIAA1246 SALM1 | Q9ULH4 | 3 |
| Leucine-rich repeat and IQ domain-containing protein 1 | LRRIQ1 KIAA1801 | Q96JM4 | 3 |
| Leucine-rich repeat LGI family member 2 (LGI1-like protein 2) (Leucine-rich glioma-inactivated protein 2) | LGI2 KIAA1916 LGIL2 | Q8N0V4 | 3 |
| Leucine-rich repeat LGI family member 3 (LGI1-like protein 4) (Leucine-rich glioma-inactivated protein 3) | LGI3 LGIL4 UNQ8190/PRO23199 | Q8N145 | 3 |
| Leucine-rich repeat-containing G-protein coupled receptor 5 (G-protein coupled receptor 49) (G-protein coupled receptor 67) (G-protein coupled receptor HG38) | LGR5 GPR49 GPR67 | O75473 | 3 |
| Leucine-rich repeat-containing protein 19 | LRRC19 | Q9H756 | 3 |
| Leucine-rich repeat-containing protein 37B (C66 SLIT-like testicular protein) | LRRC37B | Q96QE4 | 3 |
| Leucine-rich repeat-containing protein 43 | LRRC43 | Q8N309 | 3 |
| Leucine-rich repeat-containing protein 45 | LRRC45 | Q96CN5 | 3 |
| Leucine-rich repeat-containing protein 7 (Densin-180) (Densin) (Protein LAP1) | LRRC7 KIAA1365 LAP1 | Q96NW7 | 3 |
| Leucine-rich repeats and immunoglobulin-like domains protein 3 (LIG-3) | LRIG3 LIG3 UNQ287/PRO326/PRO335 | Q6UXM1 | 3 |
| Leukocyte cell-derived chemotaxin-2 (LECT-2) (hLECT2) | LECT2 | O14960 | 3 |
| Leukocyte immunoglobulin-like receptor subfamily A member 1 (CD85 antigen-like family member I) (Leukocyte immunoglobulin-like receptor 6) (LIR-6) (CD antigen CD85i) | LILRA1 LIR6 | O75019 | 3 |
| Leukocyte-specific transcript 1 protein (Protein B144) | LST1 B144 | O00453 | 3 |
| LHFPL tetraspan subfamily member 6 protein (Lipoma HMGIC fusion partner) | LHFPL6 LHFP | Q9Y693 | 3 |
| Ligand of Numb protein X 2 (Numb-binding protein 2) (PDZ domain-containing RING finger protein 1) | LNX2 PDZRN1 | Q8N448 | 3 |
| Ligand-dependent nuclear receptor-interacting factor 1 (Receptor-interacting factor 1) | LRIF1 C1orf103 RIF1 | Q5T3J3 | 3 |
| LIM and senescent cell antigen-like-containing domain protein 2 (LIM-like protein 2) (Particularly interesting new Cys-His protein 2) (PINCH-2) | LIMS2 PINCH2 | Q7Z4I7 | 3 |
| LIM domain containing preferred translocation partner in lipoma, isoform CRA_e (Lipoma-preferred partner) | LPP hCG_17155 | C9JUT4 | 3 |
| LINE-1 retrotransposable element ORF1 protein (L1ORF1p) (LINE retrotransposable element 1) (LINE1 retrotransposable element 1) | L1RE1 LRE1 | Q9UN81 | 3 |
| LINE-1 type transposase domain-containing protein 1 (ES cell-associated protein 11) | L1TD1 ECAT11 | Q5T7N2 | 3 |
| Liprin-beta-2 (Protein tyrosine phosphatase receptor type f polypeptide-interacting protein-binding protein 2) (PTPRF-interacting protein-binding protein 2) | PPFIBP2 | B7Z433 | 3 |
| LMBR1 domain-containing protein 2 | LMBRD2 | Q68DH5 | 3 |
| LOC646903 protein (Fragment) | LOC646903 | Q96EG4 | 3 |
| Long-chain-fatty-acid--CoA ligase 4 (EC 6.2.1.3) (Long-chain acyl-CoA synthetase 4) (LACS 4) | ACSL4 ACS4 FACL4 LACS4 | Q5JWV8 | 3 |
| Low affinity immunoglobulin gamma Fc region receptor II-b (IgG Fc receptor II-b) (CDw32) (Fc-gamma RII-b) (Fc-gamma-RIIb) (FcRII-b) (CD antigen CD32) | FCGR2B CD32 FCG2 IGFR2 | P31994 | 3 |
| Low affinity immunoglobulin gamma Fc region receptor III-B (Fc-gamma RIII-beta) (Fc-gamma RIII) (Fc-gamma RIIIb) (FcRIII) (FcRIIIb) (FcR-10) (IgG Fc receptor III-1) (CD antigen CD16b) | FCGR3B CD16B FCG3 FCGR3 IGFR3 | O75015 | 3 |
| LRRC16A protein | LRRC16A | B2RTQ5 | 3 |
| LUC7-like isoform b variant (Fragment) | 0 | Q53G47 | 3 |
| Ly6/PLAUR domain-containing protein 1 (Putative HeLa tumor suppressor) (PHTS) | LYPD1 LYPDC1 PSEC0181 UNQ3079/PRO9917 | Q8N2G4 | 3 |
| Ly6/PLAUR domain-containing protein 2 | LYPD2 LYPDC2 UNQ430/PRO788 | Q6UXB3 | 3 |
| Ly6/PLAUR domain-containing protein 4 | LYPD4 UNQ2552/PRO6181 | Q6UWN0 | 3 |
| Lymphocyte antigen 6 complex locus protein G6c | LY6G6C C6orf24 G6C NG24 UNQ1947/PRO4430 | O95867 | 3 |
| Lysine-rich nucleolar protein 1 (Protein FAM191A) (Testis-specific gene 118 protein) | KNOP1 C16orf88 FAM191A TSG118 | Q1ED39 | 3 |
| Lysine-specific demethylase 5C (EC 1.14.11.-) (Histone demethylase JARID1C) (Jumonji/ARID domain-containing protein 1C) (Protein SmcX) (Protein Xe169) | KDM5C DXS1272E JARID1C SMCX XE169 | P41229 | 3 |
| Lysine-specific demethylase 8 (EC 1.14.11.27) (JmjC domain-containing protein 5) (Jumonji domain-containing protein 5) | KDM8 JMJD5 | Q8N371 | 3 |
| Lysozyme C | LYZ | F8VV32 | 3 |
| M-phase phosphoprotein 6 | MPHOSPH6 MPP6 | Q99547 | 3 |
| MAGUK p55 subfamily member 6 (Membrane protein, palmitoylated 6 (MAGUK p55 subfamily member 6), isoform CRA_a) | MPP6 hCG_38837 | B8ZZG1 | 3 |
| Major prion protein (Fragment) | PRNP | A2A2V1 | 3 |
| Major vault protein (Fragment) | MVP | H3BP76 | 3 |
| Major vault protein (Fragment) | MVP | I3L155 | 3 |
| Malate dehydrogenase (EC 1.1.1.37) | 0 | B3KTM1 | 3 |
| Malate dehydrogenase (EC 1.1.1.37) (Fragment) | MDH2 | Q75MT9 | 3 |
| Malate dehydrogenase, cytoplasmic (EC 1.1.1.37) (Cytosolic malate dehydrogenase) (Diiodophenylpyruvate reductase) (EC 1.1.1.96) | MDH1 MDHA | F5H098 | 3 |
| Malonyl-CoA decarboxylase, mitochondrial (MCD) (EC 4.1.1.9) | MLYCD | O95822 | 3 |
| MANSC domain-containing protein 4 | MANSC4 | A6NHS7 | 3 |
| MAP kinase-interacting serine/threonine-protein kinase 1 (EC 2.7.11.1) (MAP kinase signal-integrating kinase 1) (MAPK signal-integrating kinase 1) (Mnk1) | MKNK1 MNK1 | Q9BUB5 | 3 |
| MCM domain-containing protein 2 | MCMDC2 C8orf45 | Q4G0Z9 | 3 |
| MDN1 protein (Fragment) | MDN1 | Q6PJJ1 | 3 |
| MDS1 and EVI1 complex locus protein EVI1 (Ecotropic virus integration site 1 protein homolog) (EVI-1) | MECOM EVI1 | Q03112 | 3 |
| Meckelin (Meckel syndrome type 3 protein) (Transmembrane protein 67) | TMEM67 MKS3 | Q5HYA8 | 3 |
| Mediator of RNA polymerase II transcription subunit 10 (Mediator complex subunit 10) (Transformation-related gene 17 protein) (TRG-17) (Transformation-related gene 20 protein) (TRG-20) | MED10 L6 TRG17 TRG20 | Q9BTT4 | 3 |
| Mediator of RNA polymerase II transcription subunit 12 (Activator-recruited cofactor 240 kDa component) (ARC240) (CAG repeat protein 45) (Mediator complex subunit 12) (OPA-containing protein) (Thyroid hormone receptor-associated protein complex 230 kDa component) (Trap230) (Trinucleotide repeat-containing gene 11 protein) | MED12 ARC240 CAGH45 HOPA KIAA0192 TNRC11 TRAP230 | Q93074 | 3 |
| Mediator of RNA polymerase II transcription subunit 13 (Activator-recruited cofactor 250 kDa component) (ARC250) (Mediator complex subunit 13) (Thyroid hormone receptor-associated protein 1) (Thyroid hormone receptor-associated protein complex 240 kDa component) (Trap240) (Vitamin D3 receptor-interacting protein complex component DRIP250) (DRIP250) | MED13 ARC250 KIAA0593 THRAP1 TRAP240 | Q9UHV7 | 3 |
| Mediator of RNA polymerase II transcription subunit 27 (Cofactor required for Sp1 transcriptional activation subunit 8) (CRSP complex subunit 8) (Mediator complex subunit 27) (P37 TRAP/SMCC/PC2 subunit) (Transcriptional coactivator CRSP34) | MED27 CRSP34 CRSP8 | Q6P2C8 | 3 |
| Mediator of RNA polymerase II transcription subunit 9 (Mediator complex subunit 9) | MED9 MED25 | Q9NWA0 | 3 |
| Medium-chain-specific acyl-CoA dehydrogenase, mitochondrial (cDNA, FLJ78845, highly similar to Medium-chain specific acyl-CoA dehydrogenase, mitochondrial (EC 1.3.99.3)) | ACADM | B7Z9I1 | 3 |
| Megakaryocyte-associated tyrosine-protein kinase (EC 2.7.10.2) (CSK homologous kinase) (CHK) (Hematopoietic consensus tyrosine-lacking kinase) (Protein kinase HYL) (Tyrosine-protein kinase CTK) | MATK CTK HYL | P42679 | 3 |
| Meiosis inhibitor protein 1 (Meiosis defective protein 1) | MEI1 | Q5TIA1 | 3 |
| Meiotic nuclear division protein 1 homolog | MND1 GAJ | Q9BWT6 | 3 |
| Melanoma-associated antigen D1 (MAGE tumor antigen CCF) (MAGE-D1 antigen) (Neurotrophin receptor-interacting MAGE homolog) | MAGED1 NRAGE PP2250 PRO2292 | Q9Y5V3 | 3 |
| Melanoma-associated antigen D4 (MAGE-D4 antigen) (MAGE-E1 antigen) | MAGED4 KIAA1859 MAGED4A MAGEE1; MAGED4B | Q96JG8 | 3 |
| Membrane metallo-endopeptidase | MME | B7ZKY6 | 3 |
| Membrane protein MLC1 | MLC1 KIAA0027 WKL1 | Q15049 | 3 |
| Metabotropic glutamate receptor 5 (mGluR5) | GRM5 GPRC1E MGLUR5 | P41594 | 3 |
| Metalloendopeptidase (EC 3.4.24.-) | BMP1 | A5PLK9 | 3 |
| Metallothionein-1A (MT-1A) (Metallothionein-IA) (MT-IA) | MT1A MT1S | P04731 | 3 |
| Metallothionein-1H (MT-1H) (Metallothionein-0) (MT-0) (Metallothionein-IH) (MT-IH) | MT1H | P80294 | 3 |
| Metallothionein-1X (MT-1X) (Metallothionein-IX) (MT-IX) | MT1X | P80297 | 3 |
| Metaxin-3 | MTX3 | Q5HYI7 | 3 |
| Methyltransferase-like protein 5 (EC 2.1.1.-) | METTL5 DC3 HSPC133 | Q9NRN9 | 3 |
| Methyltransferase-like protein 9 (DORA reverse strand protein) (DREV) (DREV1) | METTL9 DREV CGI-81 | Q9H1A3 | 3 |
| MHC class I antigen | HLA-B | E5FQ95 | 3 |
| MHC class I antigen (Fragment) | HLA-B | A9XFY1 | 3 |
| MHC class I antigen (Fragment) | HLA-A | E9ABI2 | 3 |
| MHC class I antigen (Fragment) | HLA-B | Q0ZAX5 | 3 |
| MHC class II antigen (cDNA, FLJ93608, Homo sapiens major histocompatibility complex, class II, DR alpha(HLA-DRA), mRNA) | HLA-DRA HLA-DRA1 | B0UXD8 | 3 |
| MICAL-like protein 2 (Junctional Rab13-binding protein) (Molecule interacting with CasL-like 2) (MICAL-L2) | MICALL2 JRAB | Q8IY33 | 3 |