| L-lactate dehydrogenase (EC 1.1.1.27) | 0 | D6NKH9 | 1 |
| L-lactate dehydrogenase (EC 1.1.1.27) | LDHC hCG_15532 | G3XAP5 | 1 |
| L-lactate dehydrogenase A chain | LDHA | F5GXU1 | 1 |
| L-seryl-tRNA(Sec) kinase (EC 2.7.1.164) (O-phosphoseryl-tRNA(Sec) kinase) | PSTK C10orf89 | Q8IV42 | 1 |
| L-xylulose reductase (Fragment) | DCXR | J3QL34 | 1 |
| L1 cell adhesion molecule (Fragment) | L1CAM | Q7Z3Z9 | 1 |
| La 4.1 protein (Fragment) | 0 | Q14730 | 1 |
| La-related protein 1 (Fragment) | LARP1 | H0YC73 | 1 |
| La-related protein 4B (Fragment) | LARP4B | B5MCU2 | 1 |
| Laccase domain-containing protein 1 (Fatty acid metabolism-immunity nexus) | LACC1 C13orf31 FAMIN | Q8IV20 | 1 |
| Laccase domain-containing protein 1 (Fragment) | LACC1 | A2A3Z5 | 1 |
| Lactoferrin | 0 | Q5EK51 | 1 |
| Lactoferrin | 0 | B3VMW0 | 1 |
| Lactoferrin (Fragment) | 0 | Q19KS2 | 1 |
| Laforin (EC 3.1.3.-) (EC 3.1.3.16) (EC 3.1.3.48) (Glucan phosphatase) (Glycogen phosphatase) (Lafora PTPase) (LAFPTPase) | EPM2A | O95278 | 1 |
| Laforin, isoform 9 | EPM2A | B3EWF7 | 1 |
| LAMA4 protein (Fragment) | LAMA4 | Q05CF9 | 1 |
| Lambda-crystallin homolog (Fragment) | CRYL1 | A0A087WW38 | 1 |
| Lamin tail domain-containing protein 2 | LMNTD2 C11orf35 | Q8IXW0 | 1 |
| Lamina-associated polypeptide 2, isoforms beta/gamma (Fragment) | TMPO | H0YJH7 | 1 |
| Lamina-associated polypeptide 2, isoforms beta/gamma (Thymopoietin, isoform CRA_d) | TMPO hCG_2015322 | G5E972 | 1 |
| Laminin subunit alpha-2 | LAMA2 | A0A087WX80 | 1 |
| Laminin subunit alpha-3 (Epiligrin 170 kDa subunit) (E170) (Epiligrin subunit alpha) (Kalinin subunit alpha) (Laminin-5 subunit alpha) (Laminin-6 subunit alpha) (Laminin-7 subunit alpha) (Nicein subunit alpha) | LAMA3 LAMNA | Q6VU69 | 1 |
| Laminin subunit alpha-3 (Fragment) | LAMA3 | K7ERM0 | 1 |
| Laminin subunit alpha-3 (Fragment) | LAMA3 | K7EQ42 | 1 |
| Laminin subunit alpha-4 (Fragment) | LAMA4 | H0Y351 | 1 |
| Laminin subunit alpha-4 (Fragment) | LAMA4 | H0YAQ5 | 1 |
| Laminin subunit beta-4 (Laminin beta-1-related protein) | LAMB4 | A4D0S4 | 1 |
| Lanosterol 14-alpha demethylase | CYP51A1 | A0A0C4DFL7 | 1 |
| Lanosterol 14-alpha demethylase (Fragment) | CYP51A1 | C9IYR8 | 1 |
| Lanosterol synthase (Fragment) | LSS | A0A0G2JQD0 | 1 |
| Lanosterol synthase (Fragment) | LSS | C9J315 | 1 |
| Lanosterol synthase (Fragment) | LSS | H7C3A5 | 1 |
| LAPTM4A protein (Lysosomal protein transmembrane 4 alpha) (Lysosomal-associated protein transmembrane 4 alpha, isoform CRA_b) | LAPTM4A hCG_32086 | Q6IBP4 | 1 |
| Large neutral amino acids transporter small subunit 1 (4F2 light chain) (4F2 LC) (4F2LC) (CD98 light chain) (Integral membrane protein E16) (L-type amino acid transporter 1) (hLAT1) (Solute carrier family 7 member 5) (y+ system cationic amino acid transporter) | SLC7A5 CD98LC LAT1 MPE16 | Q8IV97 | 1 |
| Large neutral amino acids transporter small subunit 2 (Fragment) | SLC7A8 | H0Y2X7 | 1 |
| Large neutral amino acids transporter small subunit 4 | SLC43A2 | I3L3E3 | 1 |
| Large proline-rich protein BAG6 | BAG6 | A0A0G2JL47 | 1 |
| Large proline-rich protein BAG6 (Fragment) | BAG6 | H0Y4L1 | 1 |
| LARGE xylosyl- and glucuronyltransferase 2 | LARGE2 | E9PIZ2 | 1 |
| LARGE xylosyl- and glucuronyltransferase 2 (EC 2.4.-.-) (Glycosyltransferase-like 1B) [Includes: Xylosyltransferase LARGE2 (EC 2.4.2.-); Beta-1,3-glucuronyltransferase LARGE2 (EC 2.4.1.-)] | LARGE2 GYLTL1B PP5656 | Q8N3Y3 | 1 |
| LARS protein (Fragment) | LARS | Q6NVI4 | 1 |
| Late cornified envelope protein 1C (Late envelope protein 3) | LCE1C LEP3 | Q5T751 | 1 |
| Late cornified envelope protein 3C (Late envelope protein 15) (Small proline-rich-like epidermal differentiation complex protein 3A) | LCE3C LEP15 SPRL3A | Q5T5A8 | 1 |
| Latent-transforming growth factor beta-binding protein 1 | LTBP1 | E7EV71 | 1 |
| Latent-transforming growth factor beta-binding protein 1 (Fragment) | LTBP1 | H7C0I7 | 1 |
| Latent-transforming growth factor beta-binding protein 3 | LTBP3 | E9PJR2 | 1 |
| Latent-transforming growth factor beta-binding protein 3 | LTBP3 | E9PR84 | 1 |
| Latent-transforming growth factor beta-binding protein 3 (Fragment) | LTBP3 | E9PKW1 | 1 |
| Latent-transforming growth factor beta-binding protein 3 (Fragment) | LTBP3 | E9PPT7 | 1 |
| Latent-transforming growth factor beta-binding protein 3 (Fragment) | LTBP3 | H0YCQ2 | 1 |
| Latent-transforming growth factor beta-binding protein 3 (Fragment) | LTBP3 | H0YCX6 | 1 |
| Layilin (Fragment) | LAYN | E9PQY8 | 1 |
| LBH domain-containing protein 1 | LBHD1 C11orf48 | Q9BQE6 | 1 |
| Legumain (EC 3.4.22.34) (Asparaginyl endopeptidase) (Protease, cysteine 1) | LGMN PRSC1 | O00123 | 1 |
| Leiomodin-1 (64 kDa autoantigen 1D) (64 kDa autoantigen 1D3) (64 kDa autoantigen D1) (Leiomodin, muscle form) (Smooth muscle leiomodin) (SM-Lmod) (Thyroid-associated ophthalmopathy autoantigen) | LMOD1 | P29536 | 1 |
| Leiomodin-2 (Cardiac leiomodin) (C-LMOD) (Leiomodin) | LMOD2 | Q6P5Q4 | 1 |
| LEM domain-containing protein 2 | LEMD2 | D6RBV0 | 1 |
| Lengsin (Glutamate-ammonia ligase domain-containing protein 1) (Lens glutamine synthase-like) | LGSN GLULD1 LGS | Q5TDP6 | 1 |
| Lens fiber membrane intrinsic protein (MP18) (MP19) (MP20) | LIM2 | P55344 | 1 |
| Leptin receptor overlapping transcript-like 1 (Fragment) | LEPROTL1 | H0YBC1 | 1 |
| Lethal(2) giant larvae protein homolog 2 | LLGL2 | J3QRV5 | 1 |
| Lethal(2) giant larvae protein homolog 2 (Fragment) | LLGL2 | J3QS20 | 1 |
| Lethal(3)malignant brain tumor-like protein 3 (H-l(3)mbt-like protein 3) (L(3)mbt-like protein 3) (MBT-1) | L3MBTL3 KIAA1798 MBT1 | Q96JM7 | 1 |
| Lethal(3)malignant brain tumor-like protein 4 (H-l(3)mbt-like protein 4) (L(3)mbt-like protein 4) (L3mbt-like 4) | L3MBTL4 | Q8NA19 | 1 |
| Leucine zipper protein 2 | LUZP2 UNQ2566/PRO6246 | Q86TE4 | 1 |
| Leucine zipper transcription factor-like protein 1 (Fragment) | LZTFL1 | H7C488 | 1 |
| Leucine-rich alpha-2-glycoprotein (Leucine-rich alpha-2-glycoprotein 1) (cDNA FLJ14476 fis, clone MAMMA1001388, highly similar to Leucine-rich alpha-2-glycoprotein) (cDNA, FLJ95324, highly similar to Homo sapiens leucine-rich alpha-2-glycoprotein 1 (LRG1), mRNA) | HMFT1766 LRG1 hCG_2004087 | Q68CK4 | 1 |
| Leucine-rich repeat and immunoglobulin-like domain-containing nogo receptor-interacting protein 1 (Fragment) | LINGO1 | H0YMX3 | 1 |
| Leucine-rich repeat and IQ domain-containing protein 1 (Fragment) | LRRIQ1 | H0YCJ9 | 1 |
| Leucine-rich repeat and IQ domain-containing protein 3 (Leucine-rich repeat-containing protein 44) | LRRIQ3 LRRC44 | A6PVS8 | 1 |
| Leucine-rich repeat flightless-interacting protein 2 (Fragment) | LRRFIP2 | H7C3N9 | 1 |
| Leucine-rich repeat LGI family member 4 (LGI1-like protein 3) (Leucine-rich glioma-inactivated protein 4) | LGI4 LGIL3 UNQ6515/PRO21485 | Q8N135 | 1 |
| Leucine-rich repeat transmembrane neuronal protein 1 | LRRTM1 UNQ675/PRO1309 | Q86UE6 | 1 |
| Leucine-rich repeat transmembrane neuronal protein 2 (Leucine-rich repeat neuronal 2 protein) | LRRTM2 KIAA0416 LRRN2 | O43300 | 1 |
| Leucine-rich repeat transmembrane neuronal protein 4 | LRRTM4 UNQ3075/PRO9907 | Q86VH4 | 1 |
| Leucine-rich repeat transmembrane protein FLRT1 (Fibronectin-like domain-containing leucine-rich transmembrane protein 1) | FLRT1 UNQ752/PRO1483 | Q9NZU1 | 1 |
| Leucine-rich repeat-containing G-protein coupled receptor 4 (G-protein coupled receptor 48) | LGR4 GPR48 | G5E9B3 | 1 |
| Leucine-rich repeat-containing protein 10 | LRRC10 | Q5BKY1 | 1 |
| Leucine-rich repeat-containing protein 14B | LRRC14B | A6NHZ5 | 1 |
| Leucine-rich repeat-containing protein 18 | LRRC18 UNQ9338/PRO34010 | Q8N456 | 1 |
| Leucine-rich repeat-containing protein 30 | LRRC30 | A6NM36 | 1 |
| Leucine-rich repeat-containing protein 34 | LRRC34 | Q8IZ02 | 1 |
| Leucine-rich repeat-containing protein 37A | LRRC37A LRRC37A1 | A6NMS7 | 1 |
| Leucine-rich repeat-containing protein 37A2 | LRRC37A2 | A6NM11 | 1 |
| Leucine-rich repeat-containing protein 46 | LRRC46 | Q96FV0 | 1 |
| Leucine-rich repeat-containing protein 49 | LRRC49 | H0YMZ6 | 1 |
| Leucine-rich repeat-containing protein 49 (Tubulin polyglutamylase complex subunit 4) (PGs4) | LRRC49 | Q8IUZ0 | 1 |
| Leucine-rich repeat-containing protein 58 | LRRC58 | Q96CX6 | 1 |
| Leucine-rich repeat-containing protein 59 (Ribosome-binding protein p34) (p34) | LRRC59 PRO1855 | B2RE83 | 1 |
| Leucine-rich repeat-containing protein 7 | LRRC7 | A0A075B6E9 | 1 |
| Leucine-rich repeat-containing protein 7 (Fragment) | LRRC7 | K7ELH5 | 1 |
| Leucine-rich repeat-containing protein 74A | LRRC74A | G3V5M6 | 1 |
| Leucine-rich repeats and immunoglobulin-like domains protein 2 (LIG-2) | LRIG2 KIAA0806 LIG2 | O94898 | 1 |
| Leucine-rich repeats and immunoglobulin-like domains protein 3 | LRIG3 | C9K080 | 1 |
| Leucine-rich repeats and immunoglobulin-like domains protein 3 (Fragment) | LRIG3 | F8VYZ5 | 1 |
| Leucine-rich single-pass membrane protein 1 | LSMEM1 C7orf53 | Q8N8F7 | 1 |
| Leucine-zipper-like transcriptional regulator 1 (LZTR-1) | LZTR1 TCFL2 | Q8N653 | 1 |
| Leucocyte antigen B (Fragment) | HLA-B | Q9MY38 | 1 |
| Leucyl-cystinyl aminopeptidase (Cystinyl aminopeptidase) (EC 3.4.11.3) (Insulin-regulated membrane aminopeptidase) (Insulin-responsive aminopeptidase) (IRAP) (Oxytocinase) (OTase) (Placental leucine aminopeptidase) (P-LAP) [Cleaved into: Leucyl-cystinyl aminopeptidase, pregnancy serum form] | LNPEP OTASE | Q9TNQ3 | 1 |