| Trafficking protein particle complex subunit 3-like protein (TRAPPC3-like protein) (BET3-like protein) | TRAPPC3L BET3L | Q5T215 | 1 |
| Trafficking protein particle complex subunit 4 | TRAPPC4 | E9PKS9 | 1 |
| Trans-1,2-dihydrobenzene-1,2-diol dehydrogenase (EC 1.3.1.20) (D-xylose 1-dehydrogenase) (D-xylose-NADP dehydrogenase) (EC 1.1.1.179) (Dimeric dihydrodiol dehydrogenase) (Hum2DD) | DHDH 2DD | Q9UQ10 | 1 |
| Trans-3-hydroxy-L-proline dehydratase (EC 4.2.1.77) (Trans-L-3-hydroxyproline dehydratase) | L3HYPDH C14orf149 | Q96LJ5 | 1 |
| Trans-acting T-cell-specific transcription factor GATA-3 (GATA-binding factor 3) | GATA3 | P23771 | 1 |
| Transcription cofactor HES-6 (Fragment) | HES6 | H7C020 | 1 |
| Transcription cofactor vestigial-like protein 4 (Fragment) | VGLL4 | E7EUJ2 | 1 |
| Transcription cofactor vestigial-like protein 4 (Vgl-4) | VGLL4 KIAA0121 | Q14135 | 1 |
| Transcription elongation factor A N-terminal and central domain-containing protein (TFIIS central domain-containing protein 1) | TCEANC | Q8N8B7 | 1 |
| Transcription elongation factor A protein 1 | TCEA1 | E5RJ93 | 1 |
| Transcription elongation factor A protein 2 (Testis-specific S-II) (Transcription elongation factor S-II protein 2) (Transcription elongation factor TFIIS.l) | TCEA2 | Q15560 | 1 |
| Transcription elongation factor A protein 3 (Transcription elongation factor S-II protein 3) (Transcription elongation factor TFIIS.h) | TCEA3 TFIISH | O75764 | 1 |
| Transcription elongation factor A protein-like 3 (TCEA-like protein 3) (Transcription elongation factor S-II protein-like 3) | TCEAL3 MSTP072 | Q969E4 | 1 |
| Transcription elongation factor A protein-like 4 (TCEA-like protein 4) (Transcription elongation factor S-II protein-like 4) | TCEAL4 NPD017 | Q96EI5 | 1 |
| Transcription elongation factor A protein-like 6 (TCEA-like protein 6) (Transcription elongation factor S-II protein-like 6) | TCEAL6 | Q6IPX3 | 1 |
| Transcription elongation regulator 1-like protein | TCERG1L | Q5VWI1 | 1 |
| Transcription factor 12 (TCF-12) (Class B basic helix-loop-helix protein 20) (bHLHb20) (DNA-binding protein HTF4) (E-box-binding protein) (Transcription factor HTF-4) | TCF12 BHLHB20 HEB HTF4 | Q99081 | 1 |
| Transcription factor 4 | TCF4 | A0A0D9SG44 | 1 |
| Transcription factor A, mitochondrial (mtTFA) (Mitochondrial transcription factor 1) (MtTF1) (Transcription factor 6) (TCF-6) (Transcription factor 6-like 2) | TFAM TCF6 TCF6L2 | B5BU05 | 1 |
| Transcription factor AP-2-alpha (AP2-alpha) (AP-2 transcription factor) (Activating enhancer-binding protein 2-alpha) (Activator protein 2) (AP-2) | TFAP2A AP2TF TFAP2 | Q5TAV5 | 1 |
| Transcription factor AP-2-epsilon (AP2-epsilon) (Activating enhancer-binding protein 2-epsilon) | TFAP2E | Q6VUC0 | 1 |
| Transcription factor AP-4 (Activating enhancer-binding protein 4) (Class C basic helix-loop-helix protein 41) (bHLHc41) | TFAP4 BHLHC41 | Q01664 | 1 |
| Transcription factor BTF3 (Fragment) | BTF3 | H0Y9Y1 | 1 |
| Transcription factor COE3 (Early B-cell factor 3) (EBF-3) (Olf-1/EBF-like 2) (O/E-2) (OE-2) | EBF3 COE3 | Q9H4W6 | 1 |
| Transcription factor Dp-1 (Fragment) | TFDP1 | Q5JSB5 | 1 |
| Transcription factor Dp-2 (E2F dimerization partner 2) | TFDP2 DP2 | Q14188 | 1 |
| Transcription factor Dp-2 (Fragment) | TFDP2 | H7C5C2 | 1 |
| Transcription factor E2F1 (E2F-1) (PBR3) (Retinoblastoma-associated protein 1) (RBAP-1) (Retinoblastoma-binding protein 3) (RBBP-3) (pRB-binding protein E2F-1) | E2F1 RBBP3 | Q01094 | 1 |
| Transcription factor E2F2 (E2F-2) | E2F2 | Q14209 | 1 |
| Transcription factor E2F4 (E2F-4) | E2F4 | Q16254 | 1 |
| Transcription factor E2F7 (Fragment) | E2F7 | F8VSE7 | 1 |
| Transcription factor EB (Class E basic helix-loop-helix protein 35) (bHLHe35) | TFEB BHLHE35 | P19484 | 1 |
| Transcription factor EC (TFE-C) (Class E basic helix-loop-helix protein 34) (bHLHe34) (Transcription factor EC-like) (hTFEC-L) | TFEC BHLHE34 TCFEC TFECL | O14948 | 1 |
| Transcription factor ETV7 (ETS translocation variant 7) (ETS-related protein Tel2) (Tel-related Ets factor) (Transcription factor Tel-2) | ETV7 TEL2 TELB TREF | Q9Y603 | 1 |
| Transcription factor GATA-5 (GATA-binding factor 5) | GATA5 | Q9BWX5 | 1 |
| Transcription factor HES-2 (Class B basic helix-loop-helix protein 40) (bHLHb40) (Hairy and enhancer of split 2) | HES2 BHLHB40 | Q9Y543 | 1 |
| Transcription factor HES-5 (Class B basic helix-loop-helix protein 38) (bHLHb38) (Hairy and enhancer of split 5) | HES5 BHLHB38 | Q5TA89 | 1 |
| Transcription factor MafG (V-maf musculoaponeurotic fibrosarcoma oncogene homolog G) (hMAF) | MAFG | O15525 | 1 |
| Transcription factor PU.1 (31 kDa-transforming protein) | SPI1 | P17947 | 1 |
| Transcription factor RFX3 (Regulatory factor X 3) | RFX3 | P48380 | 1 |
| Transcription factor RFX4 | RFX4 | F8VX50 | 1 |
| Transcription factor RFX4 (Fragment) | RFX4 | F8VRD4 | 1 |
| Transcription factor SOX-1 | SOX1 | O00570 | 1 |
| Transcription factor SOX-11 | SOX11 | P35716 | 1 |
| Transcription factor SOX-13 (Islet cell antigen 12) (SRY (Sex determining region Y)-box 13) (Type 1 diabetes autoantigen ICA12) | SOX13 | Q9UN79 | 1 |
| Transcription factor SOX-4 | SOX4 | Q06945 | 1 |
| Transcription factor SOX-5 | SOX5 | P35711 | 1 |
| Transcription factor Sp4 (SPR-1) | SP4 | Q02446 | 1 |
| Transcription factor Sp7 (Zinc finger protein osterix) | SP7 OSX | Q8TDD2 | 1 |
| Transcription factor Spi-C | SPIC | Q8N5J4 | 1 |
| Transcription factor SPT20 homolog (p38-interacting protein) (p38IP) | SUPT20H C13orf19 FAM48A FP757 | Q8NEM7 | 1 |
| Transcription initiation factor TFIID subunit 4 (RNA polymerase II TBP-associated factor subunit C) (TBP-associated factor 4) (Transcription initiation factor TFIID 130 kDa subunit) (TAF(II)130) (TAFII-130) (TAFII130) (Transcription initiation factor TFIID 135 kDa subunit) (TAF(II)135) (TAFII-135) (TAFII135) | TAF4 TAF2C TAF2C1 TAF4A TAFII130 TAFII135 | O00268 | 1 |
| Transcription initiation factor TFIID subunit 7-like (Cancer/testis antigen 40) (CT40) (RNA polymerase II TBP-associated factor subunit Q) (TATA box-binding protein-associated factor 50 kDa) (Transcription initiation factor TFIID 50 kDa subunit) | TAF7L TAF2Q | Q5H9L4 | 1 |
| Transcription initiation factor TFIID subunit 9 (Fragment) | TAF9 | D6RHW1 | 1 |
| Transcription initiation protein SPT3 homolog (SPT3-like protein) | SUPT3H SPT3 | O75486 | 1 |
| Transcription intermediary factor 1-beta (Fragment) | TRIM28 | M0R0K9 | 1 |
| Transcription termination factor 1, mitochondrial (cDNA FLJ51270, highly similar to Transcription termination factor, mitochondrial) | MTERF1 | B4DPR9 | 1 |
| Transcription termination factor 2, mitochondrial (Mitochondrial transcription termination factor 2) (mTERF2) (Mitochondrial transcription termination factor-like protein) (mTERF-like) (mTERFL) (mTERF domain-containing protein 3, mitochondrial) | MTERF2 MTERFD3 | Q49AM1 | 1 |
| Transcriptional activator GLI3 (GLI3 form of 190 kDa) (GLI3-190) (GLI3 full length protein) (GLI3FL) [Cleaved into: Transcriptional repressor GLI3R (GLI3 C-terminally truncated form) (GLI3 form of 83 kDa) (GLI3-83)] | GLI3 | P10071 | 1 |
| Transcriptional activator Myb (Proto-oncogene c-Myb) | MYB | P10242 | 1 |
| Transcriptional protein SWT1 | SWT1 C1orf26 | Q5T5J6 | 1 |
| Transcriptional regulator | NIPBL | Q6IEH8 | 1 |
| Transcriptional repressor CTCFL (Brother of the regulator of imprinted sites) (CCCTC-binding factor) (CTCF paralog) (CTCF-like protein) (Cancer/testis antigen 27) (CT27) (Zinc finger protein CTCF-T) | CTCFL BORIS | Q8NI51 | 1 |
| Transcriptional repressor scratch 1 (Scratch homolog 1 zinc finger protein) (SCRT) (Scratch 1) (hScrt) | SCRT1 | Q9BWW7 | 1 |
| Transcriptional-regulating factor 1 (Breast cancer anti-estrogen resistance 2) (Transcriptional-regulating protein 132) (Zinc finger protein rapa) (Zinc finger transcription factor TReP-132) | TRERF1 BCAR2 RAPA TREP132 | Q96PN7 | 1 |
| Transducin beta-like protein 2 | TBL2 | F8WBD9 | 1 |
| Transducin-like enhancer of split 3 short isoform (Transducin-like enhancer protein 3) (Fragment) | TLE3 | Q672R2 | 1 |
| Transducin-like enhancer protein 4 (Fragment) | TLE4 | H7C4P7 | 1 |
| Transferrin receptor protein 2 (TfR2) | TFR2 | Q9UP52 | 1 |
| Transformation/transcription domain-associated protein | TRRAP | F2Z2U4 | 1 |
| Transforming acidic coiled-coil-containing protein 1 (Fragment) | TACC1 | H0YBT8 | 1 |
| Transforming acidic coiled-coil-containing protein 1 (Fragment) | TACC1 | H0YAY0 | 1 |
| Transforming acidic coiled-coil-containing protein 1 (Fragment) | TACC1 | E5RI10 | 1 |
| Transforming acidic coiled-coil-containing protein 3 (Fragment) | TACC3 | E7EMT0 | 1 |
| Transforming acidic coiled-coil-containing protein 3 (Fragment) | TACC3 | H0Y8F2 | 1 |
| Transforming growth factor beta receptor type 3 | TGFBR3 | E9PMG7 | 1 |
| Transforming growth factor beta regulator 4, isoform CRA_b | TBRG4 hCG_19244 | D3DVL7 | 1 |
| Transforming growth factor beta-1-induced transcript 1 protein | TGFB1I1 | H3BRP2 | 1 |
| Transforming growth factor beta-1-induced transcript 1 protein (Fragment) | TGFB1I1 | H3BQC4 | 1 |
| Transforming growth factor-beta-induced protein ig-h3 (Beta ig-h3) (Kerato-epithelin) (RGD-containing collagen-associated protein) (RGD-CAP) | TGFBI BIGH3 | O14471 | 1 |
| Transforming growth factor-beta-induced protein ig-h3 (Fragment) | TGFBI | H0Y8M8 | 1 |
| Transforming growth factor-beta-induced protein ig-h3 (Fragment) | TGFBI | H0YAH8 | 1 |
| Transforming protein RhoA | RHOA | C9JX21 | 1 |
| Transgelin | TAGLN | Q6FI52 | 1 |
| Transgelin variant (Fragment) | 0 | Q53GC9 | 1 |
| Transgelin-3 | TAGLN3 | C9J5W6 | 1 |
| Transient receptor potential cation channel subfamily M member 5 (Long transient receptor potential channel 5) (LTrpC-5) (LTrpC5) (MLSN1- and TRP-related gene 1 protein) | TRPM5 LTRPC5 MTR1 | Q9NZQ8 | 1 |
| Transient receptor potential cation channel subfamily M member 6 (EC 2.7.11.1) (Channel kinase 2) (Melastatin-related TRP cation channel 6) | TRPM6 CHAK2 | Q9BX84 | 1 |
| Transient receptor potential cation channel subfamily M member 8 | TRPM8 | A0A0A0MSV2 | 1 |
| Transient receptor potential cation channel subfamily V member 2 (Fragment) | TRPV2 | H7BZK2 | 1 |
| Transient receptor potential cation channel subfamily V member 5 (TrpV5) (Calcium transport protein 2) (CaT2) (Epithelial calcium channel 1) (ECaC) (ECaC1) (Osm-9-like TRP channel 3) (OTRPC3) | TRPV5 ECAC1 | Q8N4C1 | 1 |
| Transient receptor potential cation channel subfamily V member 6 | TRPV6 | A0A1X7SBT1 | 1 |
| Transketolase | TKT | F8WAX4 | 1 |
| Transketolase | TKT | F8W888 | 1 |
| Transketolase-like protein 1 (EC 2.2.1.1) (Transketolase 2) (TK 2) (Transketolase-related protein) | TKTL1 TKR TKT2 | P51854 | 1 |
| Translation initiation factor eIF-2B subunit alpha (Fragment) | EIF2B1 | H0YGG4 | 1 |
| Translation initiation factor eIF-2B subunit delta | EIF2B4 | A0A087WTA5 | 1 |
| Translation initiation factor eIF-2B subunit delta (eIF-2B GDP-GTP exchange factor subunit delta) | EIF2B4 EIF2BD | Q5BJF4 | 1 |
| Translation initiation factor eIF-2B subunit epsilon (eIF-2B GDP-GTP exchange factor subunit epsilon) | EIF2B5 EIF2BE | Q96D04 | 1 |
| Translation initiation factor eIF-2B subunit gamma (Fragment) | EIF2B3 | H0Y580 | 1 |