| High affinity immunoglobulin epsilon receptor subunit alpha (Fc-epsilon RI-alpha) (FcERI) (IgE Fc receptor subunit alpha) | Fcer1a Fce1a | P20489 | 3 |
| High affinity immunoglobulin epsilon receptor subunit beta (FcERI) (Fc epsilon receptor I beta-chain) (IgE Fc receptor subunit beta) (Membrane-spanning 4-domains subfamily A member 2) | Ms4a2 Fce1b Fcer1b Ms4a1 | P20490 | 3 |
| High mobility group protein B2 (High mobility group protein 2) (HMG-2) | Hmgb2 Hmg2 | P30681 | 3 |
| Histocompatibility 2, M region locus 10.1 (MHC class Ib antigen) (Protein H2-M10.1) | H2-M10.1 M10 | O19443 | 3 |
| Histone acetyltransferase KAT5 (EC 2.3.1.48) (60 kDa Tat-interactive protein) (Tip60) (Histone acetyltransferase HTATIP) (Lysine acetyltransferase 5) | Kat5 Htatip Tip60 | Q8CHK4 | 3 |
| Histone chaperone ASF1A (Anti-silencing function protein 1 homolog A) | Asf1a | Q9CQE6 | 3 |
| Histone H2A type 3 | Hist3h2a | Q8BFU2 | 3 |
| Histone-arginine methyltransferase CARM1 (EC 2.1.1.-) (EC 2.1.1.125) (Coactivator-associated arginine methyltransferase 1) (Protein arginine N-methyltransferase 4) | Carm1 Prmt4 | Q9WVG6 | 3 |
| Histone-lysine N-methyltransferase 2C | Kmt2c Mll3 | F8WI37 | 3 |
| Histone-lysine N-methyltransferase SETDB1 | Setdb1 | D3YYC3 | 3 |
| Homeobox even-skipped homolog protein 1 (EVX-1) | Evx1 | P23683 | 3 |
| Homeobox protein aristaless-like 3 (Proline-rich transcription factor ALX3) | Alx3 | O70137 | 3 |
| Homeobox protein HMX3 (Homeobox protein H6 family member 3) (Homeobox protein Nkx-5.1) | Hmx3 Nkx-5.1 Nkx5-1 | P42581 | 3 |
| Homeobox protein Hox-C12 (Homeobox protein Hox-3.8) | Hoxc12 Hox-3.8 Hoxc-12 | Q8K5B8 | 3 |
| Homeobox protein Hox-C4 (Homeobox protein Hox-3.5) | Hoxc4 Hox-3.5 Hoxc-4 | Q08624 | 3 |
| Homeobox protein Hox-D12 (Homeobox protein Hox-4.7) (Homeobox protein Hox-5.6) | Hoxd12 Hox-4.7 Hoxd-12 | P23812 | 3 |
| Homeobox protein Nkx-2.6 (Homeobox protein NK-2 homolog F) | Nkx2-6 Nkx-2.6 Nkx2f | P43688 | 3 |
| Homeobox protein orthopedia | Otp | O09113 | 3 |
| Homeobox protein SIX1 (Sine oculis homeobox homolog 1) | Six1 | Q62231 | 3 |
| Homer protein homolog 1 (Homer-1) (VASP/Ena-related gene up-regulated during seizure and LTP 1) (Vesl-1) | Homer1 Vesl1 | Q9Z2Y3 | 3 |
| Hsc70-interacting protein (Hip) (Protein FAM10A1) (Protein ST13 homolog) | St13 Fam10a1 Hip | Q99L47 | 3 |
| Hyaluronan and proteoglycan link protein 2 (Brain link protein 1) | Hapln2 Bral1 | Q9ESM3 | 3 |
| Hypoxia up-regulated protein 1 (GRP-170) (140 kDa Ca(2+)-binding protein) (CBP-140) | Hyou1 Grp170 | Q9JKR6 | 3 |
| Immunoglobulin superfamily member 5 (IgSF5) (Junctional adhesion molecule 4) (JAM-4) | Igsf5 Jam4 | Q7TSN7 | 3 |
| Importin subunit alpha-1 (Importin alpha P1) (Karyopherin subunit alpha-2) (Pendulin) (Pore targeting complex 58 kDa subunit) (PTAC58) (RAG cohort protein 1) (SRP1-alpha) | Kpna2 Rch1 | P52293 | 3 |
| Importin subunit alpha-7 (Importin alpha-S2) (Karyopherin subunit alpha-6) | Kpna6 Kpna5 | O35345 | 3 |
| Inducible T-cell costimulator (Activation-inducible lymphocyte immunomediatory molecule) (CD28 and CTLA-4-like protein) (CCLP) (CD28-related protein 1) (CRP-1) (CD antigen CD278) | Icos Ailim | Q9WVS0 | 3 |
| Inhibitor of nuclear factor kappa-B kinase-interacting protein (I kappa-B kinase-interacting protein) (IKBKB-interacting protein) (IKK-interacting protein) | Ikbip Ikip | Q9DBZ1 | 3 |
| Inner centromere protein | Incenp | Q9WU62 | 3 |
| Inorganic pyrophosphatase 2, mitochondrial (EC 3.6.1.1) (Pyrophosphate phospho-hydrolase 2) (PPase 2) | Ppa2 | Q91VM9 | 3 |
| Inositol (Myo)-1(Or 4)-monophosphatase 1 (Inositol (Myo)-1(Or 4)-monophosphatase 1, isoform CRA_a) (Inositol monophosphatase 1) (Myo-inositol monophosphatase 1) | Impa1 mCG_1639 | Q924B0 | 3 |
| Inositol 1,4,5-trisphosphate receptor type 2 (IP3 receptor isoform 2) (IP3R 2) (InsP3R2) (Inositol 1,4,5-trisphosphate type V receptor) (Type 2 inositol 1,4,5-trisphosphate receptor) (Type 2 InsP3 receptor) | Itpr2 Itpr5 | Q9Z329 | 3 |
| Inositol hexakisphosphate kinase 3 (InsP6 kinase 3) (EC 2.7.4.21) (Inositol hexaphosphate kinase 3) | Ip6k3 Ihpk3 | Q8BWD2 | 3 |
| Inositol polyphosphate multikinase (EC 2.7.1.151) (Inositol 1,3,4,6-tetrakisphosphate 5-kinase) | Ipmk Impk | Q7TT16 | 3 |
| Insulin-like peptide INSL6 (Insulin-like peptide 6) [Cleaved into: Insulin-like peptide INSL6 B chain; Insulin-like peptide INSL6 A chain] | Insl6 | Q9QY05 | 3 |
| Integral membrane protein DGCR2/IDD (Seizure-related membrane-bound adhesion protein) | Dgcr2 Dgsc Idd Sez-12 Sez12 | P98154 | 3 |
| Integral membrane protein GPR137B (Transmembrane 7 superfamily member 1 protein) | Gpr137b Tm7sf1 | Q8BNQ3 | 3 |
| Integral membrane protein GPR180 | Gpr180 MNCb-3029 | Q8BPS4 | 3 |
| Integrator complex subunit 5 (Int5) | Ints5 | Q8CHT3 | 3 |
| Integrator complex subunit 7 (Int7) | Ints7 | Q7TQK1 | 3 |
| Integrator complex subunit 9 (Int9) | Ints9 D14Ertd231e | Q8K114 | 3 |
| Integrin alpha-4 (CD49 antigen-like family member D) (Integrin alpha-IV) (Lymphocyte Peyer patch adhesion molecules subunit alpha) (LPAM subunit alpha) (VLA-4 subunit alpha) (CD antigen CD49d) | Itga4 | Q00651 | 3 |
| Integrin alpha-E (Integrin alpha M290) (CD antigen CD103) [Cleaved into: Integrin alpha-E light chain; Integrin alpha-E heavy chain] | Itgae | Q60677 | 3 |
| Integrin alpha-V (Vitronectin receptor subunit alpha) (CD antigen CD51) [Cleaved into: Integrin alpha-V heavy chain; Integrin alpha-V light chain] | Itgav | P43406 | 3 |
| Interferon alpha-inducible protein 27-like protein 2A | Ifi27 Ifi27l1 | E9Q1C5 | 3 |
| Interferon alpha-inducible protein 27-like protein 2A (Interferon-stimulated gene 12 protein) (ISG12) | Ifi27l2a Ifi27 Isg12 | Q8R412 | 3 |
| Interferon alpha-inducible protein 27-like protein 2B (Interferon-stimulated gene 12 protein B2) (ISG12(b2)) | Ifi27l2b Isg12(b2) | Q8VC49 | 3 |
| Interferon regulatory factor 5 (IRF-5) | Irf5 | P56477 | 3 |
| Interferon-induced protein 44-like [Cleaved into: Minor histocompatibility antigen HA-28 (HLA-HA28) (IFL8)] | Ifi44l H28 | Q9BDB7 | 3 |
| Interferon-inducible protein AIM2 (Interferon-inducible protein 210) (Ifi-210) (Interferon-inducible protein p210) | Aim2 Gm1313 Ifi210 | Q91VJ1 | 3 |
| Interleukin enhancer-binding factor 3 | Ilf3 | Q9Z1X4 | 3 |
| Interleukin-1 receptor accessory protein (IL-1 receptor accessory protein) (IL-1RAcP) | Il1rap | Q61730 | 3 |
| Interleukin-1 receptor-like 1 (Lymphocyte antigen 84) (Protein ST2) (Protein T1) | Il1rl1 Ly84 St2 Ste2 | P14719 | 3 |
| Interleukin-15 (IL-15) | Il15 | P48346 | 3 |
| Interleukin-15 receptor subunit alpha (IL-15 receptor subunit alpha) (IL-15R-alpha) (IL-15RA) (CD antigen CD215) [Cleaved into: Soluble interleukin-15 receptor subunit alpha (sIL-15 receptor subunit alpha) (sIL-15R-alpha) (sIL-15RA)] | Il15ra | Q60819 | 3 |
| Interleukin-17 receptor E (IL-17 receptor E) (IL-17RE) | Il17re | Q8BH06 | 3 |
| Interleukin-21 receptor (IL-21 receptor) (IL-21R) (Lymphocyte receptor beta) (LR-beta) (Novel cytokine receptor 8) (NR8) (Novel interleukin receptor) (CD antigen CD360) | Il21r Nilr | Q9JHX3 | 3 |
| Interleukin-27 receptor subunit alpha (IL-27 receptor subunit alpha) (IL-27R subunit alpha) (IL-27R-alpha) (IL-27RA) (Type I T-cell cytokine receptor) (TCCR) (WSX-1) | Il27ra Tccr Wsx1 | O70394 | 3 |
| Interleukin-3 receptor subunit alpha (IL-3 receptor subunit alpha) (IL-3R subunit alpha) (IL-3R-alpha) (IL-3RA) (Interleukin-3 receptor class II alpha chain) (CD antigen CD123) | Il3ra Sut-1 | P26952 | 3 |
| Interleukin-34 (IL-34) | Il34 | Q8R1R4 | 3 |
| Interleukin-7 receptor subunit alpha (IL-7 receptor subunit alpha) (IL-7R subunit alpha) (IL-7R-alpha) (IL-7RA) (CD antigen CD127) | Il7r | P16872 | 3 |
| Interphotoreceptor matrix proteoglycan 2 (Sialoprotein associated with cones and rods proteoglycan) (Spacrcan) | Impg2 | Q80XH2 | 3 |
| Interstitial collagenase A (EC 3.4.24.7) (Matrix metalloproteinase-1a) (MMP-1a) (Mcol-A) | Mmp1a McolA | Q9EPL5 | 3 |
| Iron-sulfur cluster assembly 1 homolog, mitochondrial (HESB-like domain-containing protein 2) (Iron-sulfur assembly protein IscA) | Isca1 Hbld2 | Q9D924 | 3 |
| Iroquois-class homeodomain protein IRX-2 (Homeodomain protein IRXA2) (Iroquois homeobox protein 2) (Iroquois-class homeobox protein Irx6) | Irx2 Irx6 Irxa2 | P81066 | 3 |
| Isocitrate dehydrogenase [NAD] subunit alpha, mitochondrial (EC 1.1.1.41) (Isocitric dehydrogenase subunit alpha) (NAD(+)-specific ICDH subunit alpha) | Idh3a | Q9D6R2 | 3 |
| Isopentenyl-diphosphate Delta-isomerase 1 (EC 5.3.3.2) (Isopentenyl pyrophosphate isomerase 1) (IPP isomerase 1) (IPPI1) | Idi1 | P58044 | 3 |
| Kalirin (EC 2.7.11.1) (Protein Duo) (Serine/threonine-protein kinase with Dbl- and pleckstrin homology domain) | Kalrn | A2CG49 | 3 |
| Kallikrein 1-related peptidase b9 (EC 3.4.21.35) (Epidermal growth factor-binding protein type C) (EGF-BP C) (Glandular kallikrein K9) (mGK-9) (Tissue kallikrein-9) | Klk1b9 Egfbp3 Klk-9 Klk9 | P15949 | 3 |
| Kallikrein 1-related peptidase b9 (Kallikrein 9) (Klk9 protein) | Klk9 mCG_1051030 | Q32M27 | 3 |
| Kallikrein 6, isoform CRA_a (Kallikrein-1) (Klk6 protein) (Neurosin) | Klk6 Prss18 mCG_133315 | Q91Y82 | 3 |
| KAT8 regulatory NSL complex subunit 1-like protein | Kansl1l Kiaa4189 | Q5DTI6 | 3 |
| Kelch domain-containing protein 10 | Klhdc10 Kiaa0265 | Q6PAR0 | 3 |
| Kelch domain-containing protein 3 (Protein Peas) (Testis intracellular mediator protein) | Klhdc3 Peas | Q8VEM9 | 3 |
| Kelch-like protein 11 | Klhl11 | Q8CE33 | 3 |
| Kelch-like protein 22 | Klhl22 Kelchl | Q99JN2 | 3 |
| Keratin associated protein 31-2 (MCG1025732) (Protein Krtap31-2) | Krtap31-2 OTTMUSG00000002177 mCG_1025732 | Q8CAY5 | 3 |
| Keratin, type I cuticular Ha2 (Hair keratin, type I Ha2) (Keratin-32) (K32) | Krt32 Hka2 Krt1-2 Krtha2 | Q62168 | 3 |
| Keratin, type I cuticular Ha5 (Hair keratin, type I Ha5) (Keratin-35) (K35) | Krt35 Krt1-24 | Q497I4 | 3 |
| Keratin, type II cuticular Hb3 (Keratin-83) (K83) (Type II hair keratin Hb3) (Type-II keratin Kb23) | Krt83 Kb23 Krt2-25 | Q6IMF0 | 3 |
| Keratin, type II cuticular Hb4 (65 kDa type II keratin) (Keratin-84) (K84) (Type II hair keratin Hb4) (Type-II keratin Kb24) | Krt84 Krt2-16 Krthb4 | Q99M73 | 3 |
| Keratin, type II cytoskeletal 75 (Cytokeratin-75) (CK-75) (Keratin-6 hair follicle) (mK6hf) (Keratin-75) (K75) (Type II keratin-K6hf) (Type-II keratin Kb18) | Krt75 Kb18 | Q8BGZ7 | 3 |
| Keratin-associated protein 12-1 | Krtap12-1 | Q9Z287 | 3 |
| Kielin/chordin-like protein (Cysteine-rich BMP regulator 2) (Cysteine-rich motor neuron 2 protein) (CRIM-2) (Kielin/chordin-like protein 1) (KCP-1) | Kcp Crim2 Kcp1 | Q3U492 | 3 |
| Kinesin family member C2 (Kinesin-like protein KIFC2) | Kifc2 mCG_23628 | G3X8Q6 | 3 |
| Kinesin-like protein KIF24 | Kif24 | Q6NWW5 | 3 |
| Kininogen-1 [Cleaved into: Kininogen-1 heavy chain; Bradykinin; Kininogen-1 light chain] | Kng1 Kng | O08677 | 3 |
| KiSS-1 receptor (KiSS-1R) (G-protein coupled receptor 54) (G-protein coupled receptor OT7T175) (mOT7T175) (Kisspeptins receptor) (Metastin receptor) | Kiss1r Gpr54 | Q91V45 | 3 |
| Krueppel-like factor 16 (Basic transcription element-binding protein 4) (BTE-binding protein 4) (Dopamine receptor-regulating factor) (Transcription factor BTEB4) | Klf16 Bteb4 Drrf | P58334 | 3 |
| Krueppel-like factor 2 (Lung krueppel-like factor) | Klf2 Lklf | Q60843 | 3 |
| Kv channel-interacting protein 2 (KChIP2) (A-type potassium channel modulatory protein 2) (Potassium channel-interacting protein 2) | Kcnip2 Kchip2 | Q9JJ69 | 3 |
| Kynurenine formamidase (KFA) (KFase) (EC 3.5.1.9) (Arylformamidase) (N-formylkynurenine formamidase) (FKF) | Afmid | Q8K4H1 | 3 |
| L-aminoadipate-semialdehyde dehydrogenase-phosphopantetheinyl transferase (EC 2.7.8.-) (4'-phosphopantetheinyl transferase) (Alpha-aminoadipic semialdehyde dehydrogenase-phosphopantetheinyl transferase) (AASD-PPT) | Aasdhppt | Q9CQF6 | 3 |
| L-gulonolactone oxidase (LGO) (EC 1.1.3.8) (L-gulono-gamma-lactone oxidase) (GLO) | Gulo | P58710 | 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 | Q8VBT2 | 3 |
| L1 cell adhesion molecule (Neural cell adhesion molecule L1) | L1cam | Q6PGJ3 | 3 |
| La-related protein 4 (La ribonucleoprotein domain family member 4) | Larp4 | Q8BWW4 | 3 |
| La-related protein 6 (Acheron) (Achn) (La ribonucleoprotein domain family member 6) | Larp6 | Q8BN59 | 3 |
| Lactadherin (MFGM) (Milk fat globule-EGF factor 8) (MFG-E8) (SED1) (Sperm surface protein SP47) (MP47) | Mfge8 | P21956 | 3 |
| Lactation elevated protein 1 | Lace1 | Q3V384 | 3 |