| NHL repeat-containing protein 2 | Nhlrc2 | Q8BZW8 | 1 |
| Nicotinamide/nicotinic acid mononucleotide adenylyltransferase 1 (NMN/NaMN adenylyltransferase 1) (EC 2.7.7.1) (EC 2.7.7.18) (Nicotinamide mononucleotide adenylyltransferase 1) (NMN adenylyltransferase 1) (Nicotinate-nucleotide adenylyltransferase 1) (NaMN adenylyltransferase 1) | Nmnat1 D4Cole1e Nmnat | Q9EPA7 | 1 |
| Ninjurin 1, isoform CRA_a (Ninjurin-1) | Ninj1 mCG_15642 | D3YW25 | 1 |
| Ninjurin-1 | Ninj1 | D6RFN5 | 1 |
| Ninjurin-1 (Nerve injury-induced protein 1) | Ninj1 | O70131 | 1 |
| Nitric oxide-associated protein 1 | Noa1 MNCb-4931 | Q9JJG9 | 1 |
| NK-tumor recognition protein (NK-TR protein) (Natural-killer cells cyclophilin-related protein) [Includes: Putative peptidyl-prolyl cis-trans isomerase (PPIase) (EC 5.2.1.8) (Rotamase)] | Nktr | P30415 | 1 |
| NK13 (Putative uncharacterized protein) (Serine (Or cysteine) peptidase inhibitor, clade B, member 6b) (Serine (Or cysteine) peptidase inhibitor, clade B, member 6b, isoform CRA_a) (Serine (or cysteine) peptidase inhibitor, clade B, member 6b) | Serpinb6b mCG_17890 | O08804 | 1 |
| NLR family member X1 | Nlrx1 | Q3TL44 | 1 |
| Non-histone chromosomal protein HMG-14 (High mobility group nucleosome-binding domain-containing protein 1) | Hmgn1 Hmg-14 Hmg14 | P18608 | 1 |
| Non-histone chromosomal protein HMG-17 | Hmgn2 | A3KGL9 | 1 |
| Non-histone chromosomal protein HMG-17 (High mobility group nucleosome-binding domain-containing protein 2) | Hmgn2 Hmg-17 Hmg17 | P09602 | 1 |
| Non-receptor tyrosine-protein kinase TYK2 (EC 2.7.10.2) | Tyk2 | Q9R117 | 1 |
| Non-specific serine/threonine protein kinase (EC 2.7.11.1) | Mark2 | E9PYX3 | 1 |
| Non-specific serine/threonine protein kinase (EC 2.7.11.1) | Mark2 | E9Q9N6 | 1 |
| Non-syndromic hearing impairment protein 5 homolog | Dfna5 Dfna5h | Q9Z2D3 | 1 |
| Non-syndromic hearing impairment protein 5 homolog | Dfna5 | D3YYP5 | 1 |
| Non-syndromic hearing impairment protein 5 homolog | Dfna5 | E9Q5V3 | 1 |
| Novel protein | Gm11487 OTTMUSG00000001246 RP23-289L21.1-001 | Q5RIS0 | 1 |
| Nras protein | Nras | Q4FJP3 | 1 |
| NSFL1 cofactor p47 | Nsfl1c | A2AT02 | 1 |
| Nuclear autoantigen Sp-100 (Nuclear dot-associated Sp100 protein) (Speckled 100 kDa) | Sp100 | O35892 | 1 |
| Nuclear autoantigenic sperm protein | Nasp | B1AU76 | 1 |
| Nuclear autoantigenic sperm protein (NASP) | Nasp | Q99MD9 | 1 |
| Nuclear cap-binding protein subunit 2 (20 kDa nuclear cap-binding protein) | Ncbp2 | D3Z3D2 | 1 |
| Nuclear envelope integral membrane protein 1 | Nemp1 Kiaa0286 Tmem194 Tmem194a | Q6ZQE4 | 1 |
| Nuclear envelope integral membrane protein 1 | Nemp1 Tmem194 | E9Q6Z3 | 1 |
| Nuclear factor 1 | Nfia | B1AUB8 | 1 |
| Nuclear factor 1 | Nfia | B1AUB9 | 1 |
| Nuclear factor 1 | Nfia | B1AUC0 | 1 |
| Nuclear factor 1 | Nfix | E9PUH7 | 1 |
| Nuclear factor 1 | Nfix | Q3TYK3 | 1 |
| Nuclear factor 1 (Fragment) | Nfia | B1AUB6 | 1 |
| Nuclear factor 1 (Fragment) | Nfix | D3YZ00 | 1 |
| Nuclear factor 1 B-type (NF1-B) (Nuclear factor 1/B) (CCAAT-box-binding transcription factor) (CTF) (Nuclear factor I/B) (NF-I/B) (NFI-B) (TGGCA-binding protein) | Nfib | P97863 | 1 |
| Nuclear factor 1 X-type (NF1-X) (Nuclear factor 1/X) (CCAAT-box-binding transcription factor) (CTF) (Nuclear factor I/X) (NF-I/X) (NFI-X) (TGGCA-binding protein) | Nfix | P70257 | 1 |
| Nuclear inhibitor of protein phosphatase 1 | Ppp1r8 | A2ADR8 | 1 |
| Nuclear pore complex protein Nup107 | Nup107 | E9Q4V9 | 1 |
| Nuclear pore complex protein Nup160 (160 kDa nucleoporin) (Gene trap locus 1-13 protein) (GTL-13) (Nucleoporin Nup160) | Nup160 Gtl1-13 Kiaa0197 | Q9Z0W3 | 1 |
| Nuclear pore complex protein Nup50 (50 kDa nucleoporin) (Nuclear pore-associated protein 60 kDa-like) (Nucleoporin Nup50) | Nup50 Npap60 | Q9JIH2 | 1 |
| Nuclear pore complex protein Nup85 (Fragment) | Nup85 | Z4YLV0 | 1 |
| Nuclear pore complex protein Nup85 (Fragment) | Nup85 | Z4YM95 | 1 |
| Nuclear pore complex-associated intranuclear coiled-coil protein TPR (Nucleoprotein TPR) (Translocated promoter region) (Translocated promoter region, isoform CRA_b) | Tpr mCG_8530 | Q7M739 | 1 |
| Nuclear pore membrane glycoprotein 210 | Nup210 | A0A0R4J1I6 | 1 |
| Nuclear receptor coactivator 3 (NCoA-3) (EC 2.3.1.48) (Amplified in breast cancer-1 protein homolog) (AIB-1) (CBP-interacting protein) (p/CIP) (pCIP) (Receptor-associated coactivator 3) (RAC-3) (Steroid receptor coactivator protein 3) (SRC-3) (Thyroid hormone receptor activator molecule 1) (ACTR) (TRAM-1) | Ncoa3 Aib1 Pcip Rac3 Tram1 | O09000 | 1 |
| Nuclear receptor coactivator 4 (Putative uncharacterized protein) | Ncoa4 | Q5U4H9 | 1 |
| Nuclear receptor coactivator 5 | Ncoa5 | B7ZC24 | 1 |
| Nuclear receptor coactivator 5 (NCoA-5) (Coactivator independent of AF-2) (CIA) | Ncoa5 | Q91W39 | 1 |
| Nuclear receptor coactivator 7 | Ncoa7 | Q6DFV7 | 1 |
| Nuclear receptor-binding protein | Nrbp1 | D3YUV1 | 1 |
| Nuclear receptor-interacting protein 1 (Nuclear factor RIP140) (Receptor-interacting protein 140) | Nrip1 | Q8CBD1 | 1 |
| Nuclear speckle splicing regulatory protein 1 (Coiled-coil domain-containing protein 55) (Nuclear speckle-related protein 70) (NSrp70) | Nsrp1 Ccdc55 Nsrp70 | Q5NCR9 | 1 |
| Nuclear transcription factor, X-box-binding-like 1 | Nfxl1 | E9Q8I7 | 1 |
| Nuclear-interacting partner of ALK | Zc3hc1 | H3BKM2 | 1 |
| Nuclear-interacting partner of ALK (Nuclear-interacting partner of anaplastic lymphoma kinase) (mNIPA) (Zinc finger C3HC-type protein 1) | Zc3hc1 Nipa | Q80YV2 | 1 |
| Nuclease EXOG, mitochondrial | Exog | E9PZS5 | 1 |
| Nuclease EXOG, mitochondrial (EC 3.1.30.-) (Endonuclease G-like 1) (Endo G-like 1) | Exog Endogl1 | Q8C163 | 1 |
| Nuclease-sensitive element-binding protein 1 (Fragment) | Ybx1 | A2BGG7 | 1 |
| Nucleobindin-2 (Putative uncharacterized protein) | Nucb2 | Q3UKN6 | 1 |
| Nucleolar and coiled-body phosphoprotein 1 (140 kDa nucleolar phosphoprotein) (Nopp140) | Nolc1 Kiaa0035 | Q3UI16 | 1 |
| Nucleolar and spindle-associated protein 1 (NuSAP) | Nusap1 | Q9ERH4 | 1 |
| Nucleolar complex protein 2 homolog | Noc2l | J3QK52 | 1 |
| Nucleolar complex protein 2 homolog (Putative uncharacterized protein) | Noc2l AF155546 | Q8BHX6 | 1 |
| Nucleolar MIF4G domain-containing protein 1 (SGD1 homolog) | Nom1 Gm1040 | Q3UFM5 | 1 |
| Nucleolar pre-ribosomal-associated protein 1 | Urb1 | E9PU96 | 1 |
| Nucleolar protein 4 | Nol4 Gm1262 | P60954 | 1 |
| Nucleolar transcription factor 1 (Fragment) | Ubtf | G3UZW9 | 1 |
| Nucleolar transcription factor 1 (Upstream binding transcription factor, RNA polymerase I, isoform CRA_b) | Ubtf mCG_140722 | A2AWT7 | 1 |
| Nucleolar transcription factor 1 (Upstream binding transcription factor, RNA polymerase I, isoform CRA_c) | Ubtf mCG_140722 | A2AWT5 | 1 |
| Nucleolysin TIA-1 | Tia1 | D3YY02 | 1 |
| Nucleolysin TIA-1 | Tia1 | D3Z4H6 | 1 |
| Nucleolysin TIA-1 (Tia1 protein) | Tia1 | Q80ZW7 | 1 |
| Nucleolysin TIAR (Tial1 cytotoxic granule-associated RNA binding protein-like 1, isoform CRA_a) (Tial1 protein) | Tial1 mCG_21017 | Q921W2 | 1 |
| Nucleoporin 153 | Nup153 | E9Q3G8 | 1 |
| Nucleoporin NDC1 (Transmembrane protein 48) | Ndc1 Tmem48 | Q8VCB1 | 1 |
| Nucleoporin p58/p45 (58 kDa nucleoporin) (Nucleoporin-like protein 1) | Nup58 Nupl1 | Q8R332 | 1 |
| Nucleoside diphosphate kinase (EC 2.7.4.6) | Nme2 mCG_1461 | Q5NC82 | 1 |
| Nucleoside diphosphate kinase 7 (NDK 7) (NDP kinase 7) (EC 2.7.4.6) (nm23-M7) | Nme7 | Q9QXL8 | 1 |
| Nucleoside diphosphate kinase 7 (Putative uncharacterized protein) | Nme7 | Q8BUH2 | 1 |
| Nucleoside diphosphate-linked moiety X motif 19 (Nudix motif 19) (EC 3.6.1.-) (Androgen-regulated protein RP2) (Testosterone-regulated RP2 protein) (RP2p) | Nudt19 D7Rp2e | P11930 | 1 |
| Numb protein (Protein numb homolog) | Numb | Q05BE7 | 1 |
| Obscurin-like protein 1 | Obsl1 | D3YYU8 | 1 |
| Obscurin-like protein 1 | Obsl1 | A0A0B4J1L4 | 1 |
| Olfactory receptor | Olfr393 mCG_55726 | Q8VGR6 | 1 |
| Olfactory receptor | Olfr164 mCG_1037977 | Q8VF87 | 1 |
| Olfactory receptor | Olfr906 Olfr910 | K7N5P3 | 1 |
| Olfactory receptor 1020 (Olfactory receptor 201-2) | Olfr1020 Mor201-2 | Q8VFK7 | 1 |
| Olfactory receptor 143 (Odorant receptor K18) (Olfactory receptor 170-6) (Olfactory receptor 7A) | Olfr143 Mor170-6 Olfr7 | P34985 | 1 |
| Orexin (Hypocretin) | Hcrt mCG_20530 | Q547R2 | 1 |
| Origin recognition complex subunit 3 (Origin recognition complex subunit Latheo) | Orc3 Orc3l | Q9JK30 | 1 |
| Origin recognition complex subunit 4 | Orc4 Orc4l | O88708 | 1 |
| Otoferlin (Fer-1-like protein 2) | Otof Fer1l2 | Q9ESF1 | 1 |
| Ott protein (Ovary testis transcribed) | Ott Gm15085 | Q62012 | 1 |
| OTU domain-containing protein 6B | Otud6b | A0A0A0MQF5 | 1 |
| OTU domain-containing protein 6B (EC 3.4.19.12) | Otud6b | Q8K2H2 | 1 |
| Oxidoreductase NAD-binding domain-containing protein 1 (EC 1.-.-.-) | Oxnad1 | Q8VE38 | 1 |
| Oxysterol-binding protein | Osbpl9 mCG_2408 | E9PXZ2 | 1 |
| Oxysterol-binding protein | Osbpl9 | E9Q6C1 | 1 |
| Oxysterol-binding protein | Osbpl9 | F6UHR6 | 1 |
| Oxysterol-binding protein | Osbpl6 | F8WIZ7 | 1 |