Scorpion potassium channel toxin

Scorpion potassium channel toxins (KTxs) are 20–95 amino acid peptides stabilized by two, three or four disulfide bonds, which make their tertiary structure highly stable. KTxs have the highly conserved secondary structural arrangement α/β stabilized by cysteines (CSα/β) and, most of them, have conserved residues which are responsible for block of the ion conduction pore and promote a high affinity binding within the potassium channel pore vestibule, such as a lysine residue and an aromatic residue at 6.6 Angstroms from the carbon of that lysine, respectively (Dauplais et al.,1997).

Scorpion KTxs were originally classified into three families named α, β and γ (Tytgat et al., 1999), all of them have the above mentioned, highly conserved, α/β structural arrangement. Latter, scorpion KTxs presenting a different structural arrangement, with only two α–helices stabilized by two disulfide bonds, CSα/α, were described, and they were named κ–KTxs (Chagot et al., 2005, Srinivasan et al., 2002, Camargos et al., 2011). Among the almost 200 scorpion KTxs described until now, the α–KTx family contains about 120 peptides thus far, which are classified in more than 30 subfamilies, based on their amino acid homology (Rodriguez de la Vega et al., 2004, Tytgat et al., 1999, Zhu et al.,2010).

The table below lists all potassium channel–specific scorpion toxins classified until now. We would like to thank Dr. Ricardo C. Rodriguez de la Vega and Prof. Lourival D. Possani for their help in establishing this list.

Back to Voltage–gated potassium channel impairing toxin
Back to Venom protein nomenclature
This list is also available in UniProt

Entry name Systematic names Other names
 image all α–KTx
 image all α–KTx 1
image (P13487) KAX11_LEIQH α–KTx 1.1 Charybdotoxin, ChTX, ChTX–Lq1, ChTx–a
image (P45628) KAX12_LEIQH α–KTx 1.2 Charybdotoxin–2, ChTX–Lq2, Toxin 18–2, Lqh 18–2, ChTx–d
image (P24663) KAX13_MESTA α–KTx 1.3 Iberiotoxin, IbTx
image (P0C167) KAX14_CENLM α–KTx 1.4 Limbatotoxin, LbTx, Limbatustoxin
image (Q9NII6) KAX15_MESMA α–KTx 1.5 Neurotoxin TX1, BmTX1
image (Q9NII5) KAX16_MESMA α–KTx 1.6 Neurotoxin TX2, BmTX2
α–KTx 1.7 [Corresponds to P45660 reclassified as α–KTx 16.5]
α–KTx 1.8 [Corresponds to P0C173 reclassified as α–KTx 16.1]
image (P59848) KAX19_CENLM α–KTx 1.9 Hongotoxin–2, HgTX2
image (P83112) KAX1A_PARTR α–KTx 1.10 Parabutoxin–3, PBTx3
image (P0C182) KAX1B_CENNO α–KTx 1.11 Slotoxin, SloTx
image (P59943) KAX1C_LEIQH α–KTx 1.12 Charybdotoxin b, ChTx–b
image (P59944) KAX1D_LEIQH α–KTx 1.13 Charybdotoxin c, ChTx–c
image (H2ETQ6) KAX1E_MESMA α–KTx 1.14 Kcug1
image (H2ER23) KAX1F_MESMA α–KTx 1.15 Kcug2
image (C0HJQ8) KAX1G_MESEU α–KTx 1.16 Toxin MeKTx11–1
image (C0HJQ7) KAX1H_MESEU α–KTx 1.17 Toxin MeKTx11–3
image (C0HJS9) KAX1I_RHOJU α–KTx 1.18 Peptide Rj1m1
 image all α–KTx 2
image (P08815) KAX21_CENNO α–KTx 2.1 Noxiustoxin, NTx, Toxin II.11
image (P40755) KAX22_CENMA α–KTx 2.2 Margatoxin, MgTX
image (P45629) KAX23_CENLI α–KTx 2.3 Toxin–1, Toxin I, Toxin II.10.9.1, CllTx1
image (Q9TXD1) KAX24_CENNO α–KTx 2.4 Noxiustoxin–2, NTx2, NTx–2
image (P59847) KAX25_CENLM α–KTx 2.5 Hongotoxin–1, HgTX1
image (P59849) KAX26_CENLM α–KTx 2.6 Hongotoxin–3, HgTX3
image (P45630) KAX27_CENLI α–KTx 2.7 Toxin II, Toxin II.10.9.2, CllTx2
image (P0C161) KAX28_CENEL α–KTx 2.8 Toxin Ce1
image (P0C162) KAX29_CENEL α–KTx 2.9 Toxin Ce2
image (P0C163) KAX2A_CENEL α–KTx 2.10 Toxin Ce3
image (P0C164) KAX2B_CENEL α–KTx 2.11 Toxin Ce4
image (P0C165) KAX2C_CENEL α–KTx 2.12 Toxin Ce5
image (P85529) KAX2D_CENSU α–KTx 2.13 Toxin Css20
image (P0DL43) KAX2E_RHOGI α–KTx 2.14
image (C0HJW1) KAX2F_CENTE α–KTx 2.15 Toxin II.10.5
image (C0HJW6) KAX2G_CENTE α–KTx 2.16 Toxin II.12.5
image (C0HJW5) KAX2H_CENTE α–KTx 2.17 Toxin II.12.8
image (P0DL70) KAX2I_CENLI α–KTx 2.18 CllTx5
image (C0HJT0) KAX2J_RHOJU α–KTx 2.19 Rj1m2, alpha-KTx 2.15
 image all α–KTx 3
image (P24662) KAX31_ANDMA α–KTx 3.1 Kaliotoxin–1, KTX–1
image (P46111) KAX32_LEIQH α–KTx 3.2 Agitoxin–2, AGTX–2, AgTx2
image (P46112) KAX33_LEIQH α–KTx 3.3 Agitoxin–3, AGTX–3, AgTx3
image (P46110) KAX34_LEIQH α–KTx 3.4 Agitoxin–1, AGTX–1, AgTx1, Leiurotoxin–2, Leiurotoxin II, LeTx II
image (P45696) KAX35_ANDAU α–KTx 3.5 Kaliotoxin–2, KTX–2
image (Q9NII7) KAX36_MESMA α–KTx 3.6 Kaliotoxin, BmKTX
image (P55896) KAX37_ORTSC α–KTx 3.7 Toxin OsK1, OsK–1
image (P59886) KAX38_HOTTS α–KTx 3.8 Charybdotoxin–like peptide Bs 6, Bs6
image (P59290) KAX39_BUTOC α–KTx 3.9 Kaliotoxin–3, KTX–3
image (P0C908) KAX3A_BUTOS α–KTx 3.10 BoiTx1
image (P0C909) KAX3B_ODODO α–KTx 3.11 OdK2
image (P0C8R1) KAX3C_ANDAM α–KTx 3.12 Kaliotoxin analog, Aam–KTX
image (P86396) KAX3D_MESEU α–KTx 3.13 MeuKTx–3
α–KTx 3.14 Synthetic peptide (see Takacs et al., 2009)
image (B3EWY0) KAX3F_MESGB α–KTx 3.15 MegKTx1
image (K7XFK5) KAX3G_MESGB α–KTx 3.16 MegKTx4, Tx4
image (P0DL44) KAX3H_BUTPA α–KTx 3.17 Toxin BoPKTX
image (C0HJQ4) KAX3I_MESEU α–KTx 3.18 Toxin MeKTx13–2
image (C0HJQ6) KAX3J_MESEU α–KTx 3.19 Toxin MeKTx13–3
 image all α–KTx 4
image (P46114) KAX41_TITSE α–KTx 4.1 Tityustoxin K–α, TsTX–K–α, TSK4, Toxin II–9, Ts7
image (P56219) KAX42_TITSE α–KTx 4.2 Neurotoxin Ts–κ, TsKapa, TsK
image (P59925) KAX43_TITDI α–KTx 4.3 Toxin TdK1
image (P60210) KAX44_TITOB α–KTx 4.4 Toxin Tc30
image (Q5G8B6) KAX45_TITCO α–KTx 4.5
image (P0CB56) KAX46_TITST α–KTx 4.6 Tst23
image (P0DPT4) KAX47_TITST α–KTx 4.7
image (C0HM65) KAX48_CENMA α–KTx 4.8 Cm39
 image all α–KTx 5
image (P16341) KAX51_LEIQH α–KTx 5.1 Leiurotoxin–1, Leiurotoxin I, LeTx I, Scyllatoxin, ScyTx
image (P31719) KAX52_ANDMA α–KTx 5.2 Leiurotoxin I–like toxin P05, AmP05
image (Q9TVX3) KAX53_MESMA α–KTx 5.3 Neurotoxin BmP05, Potassium ion channel blocker P05
image (P59869) KAX54_MESTA α–KTx 5.4 Tamapin
image (P59870) KAX55_MESTA α–KTx 5.5 Tamapin–2
 image all α–KTx 6
image (Q10726) KAX61_PANIM α–KTx 6.1 Potassium channel–blocking toxin 1, Pi1, Pi–1, PiTX–K–γ
image (P80719) KAX62_SCOMA α–KTx 6.2 Maurotoxin, MTX
image (P59867) KAX63_HETSP α–KTx 6.3 Neurotoxin HsTX1
image (P58498) KAX64_PANIM α–KTx 6.4 Potassium channel–blocking toxin 4, Pi4, Pi–4
image (P58490) KAX65_PANIM α–KTx 6.5 Pi7, Pi–7, Toxin–7
image (Q6XLL9) KAX66_OPICA α–KTx 6.6 OcKTx1
image (Q6XLL8) KAX67_OPICA α–KTx 6.7 OcKTx2
image (Q6XLL7) KAX68_OPICA α–KTx 6.8 OcKTx3
image (Q6XLL6) KAX69_OPICA α–KTx 6.9 OcKTx4
image (Q6XLL5) KAX6A_OPICA α–KTx 6.10 OcKTx5
image (P0C194) KAX6B_OPIMA α–KTx 6.11 Male–specific potassium channel inhibitor IsTX
image (P0C166) KAX6C_ANUPH α–KTx 6.12 Anuroctoxin
image (P84094) KAX6D_HETSP α–KTx 6.13 Spinoxin
image (P84864) KAX6E_HADGE α–KTx 6.14 HgeTx1
image (P85528) KAX6F_HEMLE α–KTx 6.15 Hemitoxin
image (C5J896) KAX6G_OPICY α–KTx 6.16
image (P86116) KAX6H_OPICY α–KTx 6.17 Toxin OcyKTx2
 image all α–KTx 7
image (P55927) KAX71_PANIM α–KTx 7.1 Toxin PiTX–K–α, Pandinotoxin–α, Potassium channel–blocking toxin 2, Pi2, Pi–2
image (P55928) KAX72_PANIM α–KTx 7.2 Toxin PiTX–K–β, Pandinotoxin–β, Potassium channel–blocking toxin 3, Pi3, Pi–3
 image all α–KTx 8
image (P56215) KAX81_ANDMA α–KTx 8.1 Neurotoxin P01, AmP01
image (Q9U8D2) KAX82_MESMA α–KTx 8.2 Neurotoxin BmP01, Potassium ion channel blocker P01
image (P80670) KAX83_LEIQH α–KTx 8.3 Toxin GaTx2, Gating modifier of anion channels 2, Leiuropeptide II, LpII, Leiuropeptide–2
image (P80671) KAX84_LEIQH α–KTx 8.4 Leiuropeptide–3, Leiuropeptide III, LpIII
image (P0CC12) KAX85_ODODO α–KTx 8.5 OdK1
image (P86400) KAX86_MESEU α–KTx 8.6 Toxin MeuKTx–1
image (C0HJQ5) KAX87_MESEU α–KTx 8.7 Toxin MeKTx1–2
image (A0A1L2FZD4) KAX88_ORTSC α–KTx 8.8 OSK3
 image all α–KTx 9
image (Q9NJP7) KAX91_MESMA α–KTx 9.1 Neurotoxin BmP02, K+ channel blocker P02, Toxin Kk6, BmKK6
image (Q9U8D1) KAX92_MESMA α–KTx 9.2 Neurotoxin BmP03, Potassium ion channel blocker P03
image (P80669) KAX93_LEIQH α–KTx 9.3 Leiuropeptide–1, Leiuropeptide I, LpI
image (P60209) KAX94_MESTA α–KTx 9.4 Toxin BTK–2, Bt BTK–2
image (P84744) KAX95_BUTOC α–KTx 9.5 Neurotoxin Kbot1
image (P83405) KAX96_HOTJU α–KTx 9.6 Neurotoxin Tx–1, BjTx–1
image (P83406) KAX97_HOTJU α–KTx 9.7 Neurotoxin Tx–2, BjTx–2
image (B8XH46) KAX98_BUTOS α–KTx 9.8 Toxin Tx784
image (B8XH33) KAX99_BUTOS α–KTx 9.9 Toxin Tx549
image (P86398) KAX9A_MESEU α–KTx 9.10 Toxin MeuKTx–5
image (B3EWX9) KAX9B_MESGB α–KTx 9.11 Toxin MegKTx2
 image all α–KTx 10
image (O46028) KA101_CENNO α–KTx 10.1 Cobatoxin–1, CoTx1, gtIX
image (P58504) KA102_CENNO α–KTx 10.2 Cobatoxin–2, CoTx2
image (C0HJW2) KA104_CENTE α–KTx 10.4
 image all α–KTx 11
image (P60164) KA111_PARVI α–KTx 11.1 Parabutoxin–1, PBTx1
image (P60165) KA112_PARVI α–KTx 11.2 Parabutoxin–2, PBTx2
image (Q6WGI9) KA113_PARGR α–KTx 11.3 Parabutoxin–10, PBTx10
 image all α–KTx 12
image (P59936) KA121_TITSE α–KTx 12.1 Butantoxin, BuTX, TsTX–IV, Ts6
image (P0C168) KA122_TITTR α–KTx 12.2 Butantoxin, BuTX, TtBut
image (P0C185) KA123_TITCO α–KTx 12.3 Butantoxin–like peptide, Tco30
image (P0C8L1) KA124_TITST α–KTx 12.4 Butantoxin, BuTX, TstBut
image (P0CH12) KA125_LYCMC α–KTx 12.5 Neurotoxin KTx10
image (P0CI47) KA126_LYCMC α–KTx 12.6
image (P0CI48) KA127_LYCMC α–KTx 12.7
 image all α–KTx 13
image (P83243) KA131_TITOB α–KTx 13.1 Toxin Tc1
image (P83244) KA132_ORTSC α–KTx 13.2 Toxin OsK2, OsK–2
image (P84630) KA133_TITPA α–KTx 13.3 Toxin Tpa1
image (P0C8L2) KA134_TITST α–KTx 13.4 Toxin Tst–17
 image all α–KTx 14
image (Q967F9) KA141_MESMA α–KTx 14.1 Toxin Kk1, BmKK1
image (Q95NK7) KA142_MESMA α–KTx 14.2 Toxin Kk2, BmKK2, BmTXKS3, Neurotoxin BmP07, KK1
image (Q9BJX2) KA143_MESMA α–KTx 14.3 Toxin Kk3, BmKK3, Neurotoxin SKTx2
image (Q9BKB4) KA144_MESMA α–KTx 14.4 Neurotoxin SKTx1, BmSKTx1
image (A0A059U906) KA145_MESGB α–KTx 14.5 Toxin Mgib29
 image all α–KTx 15
image (P60233) KA151_ANDAU α–KTx 15.1 Peptide Aa1
image (Q8I0L5) KA152_MESMA α–KTx 15.2 Toxin BmTX3, Neurotoxin TX3, BmTX3A
image (P60208) KA153_ANDMA α–KTx 15.3 Toxin AmmTX3
image (Q867F4) KA154_ANDAU α–KTx 15.4 Toxin AaTX1, Toxin Aa1
image (Q86SD8) KA155_ANDAU α–KTx 15.5 Toxin AaTX2
image (P84777) KA156_TITDI α–KTx 15.6 Discrepin
image (Q5K0E0) KA157_ANDAM α–KTx 15.7 Neurotoxin AamTX
image (Q86BX0) KA158_MESMA α–KTx 15.8 Neurotoxin Kk4, BmKKx1
image (D9U2A8) KA159_LYCMC α–KTx 15.9 Neurotoxin KTx9
 image all α–KTx 16
image (P0C173) KA161_MESTA α–KTx 16.1 Tamulotoxin, TmTX
image (Q9NBG9) KA162_MESMA α–KTx 16.2 Martentoxin, BmK 622, BmTx3B
image (Q8MQL0) KA163_MESMA α–KTx 16.3 Charybdotoxin–like toxin 1, Kchtx1, KTX1
image (D3JXM1) KA164_MESEU α–KTx 16.4 α–KTx MeuTx3B, MeuKTx–4
image (P45660) KA165_LEIQH α–KTx 16.5 α–KTx 1.7, Lqh 15–1, Toxin 15–1
image (B8XH42) KA166_BUTOS α–KTx 16.6 Toxin Tx608
image (B3EWY1) KA167_MESGB α–KTx 16.7 α–KTx 16.5, MegKTx3
image (P0DL45) KA168_BUTPA α–KTx 16.8 Toxin BoP1
image (P0DL46) KA169_BUTPA α–KTx 16.9 Toxin BoP2
 image all α–KTx 17
image (Q95NJ8) KA171_MESMA α–KTx 17.1 Toxin Kk4, BmKK4, Toxin TXKs4
image (P0CI46) KA172_LYCMC α–KTx 17.2
 image all α–KTx 18
image (P60211) KA181_TITOB α–KTx 18.1 Toxin Tc32
image (P0C1X5) KA182_TITDI α–KTx 18.2 Toxin TdK2
image (P0C1X6) KA183_TITDI α–KTx 18.3 Toxin TdK3
 image all α–KTx 19
image (P83407) KA191_MESMA α–KTx 19.1 Neurotoxin BmBKTx1, BmK37
 image all α–KTx 20
image (P0C183) KA201_TITTR α–KTx 20.1 Toxin Tt28
 image all α–KTx 21
image (P86270) KA211_TITSE α–KTx 21.1 Tityustoxin–15, TS15
 image all α–KTx 22
image (Q8MUB1) KA221_MESMA α–KTx 22.1 Toxin Kcugx, Neurotoxin BmK38
 image all α–KTx 23
image (P0DJ31) KA231_VAEMS α–KTx 23.1 Toxin Vm24, Toxin α–KTx 21.1
image (P0DJ32) KA232_VAEMS α–KTx 23.2 Toxin Vm23, Toxin α–KTx 21.2
image (P0DP36) KA233_SCOTI α–KTx 23.3 Toxin St20
 image all α–KTx 24
image (C0HKB2) KA241_PANIM α–KTx 24.1 Potassium channel-blocking toxin 5, Pi5
 image all α–KTx 26
image (A7KJJ7) KA261_MESMA α–KTx 26.1 Neurotoxin BmK86
image (D9U2B2) KA262_LYCMC α–KTx 26.2
image (A0A059UI21) KA263_MESGB α–KTx 26.3 Toxin Mgib2
 image all α–KTx 27
image (B8XH44) KA271_BUTOS α–KTx 27.1 Toxin BoiTx771, Toxin Tx771
image (P0CI83) KA272_LYCMC α–KTx 27.2 Putative neurotoxin–B
image (P0CI84) KA273_LYCMC α–KTx 27.3 Putative neurotoxin–C
image (A0A059UEE4) KA274_MESGI α–KTx 27.4 Toxin Mgib23
 image all α–KTx 28
image (R4GUQ3) KA281_ISOMC α–KTx 28.1 Toxin ImKTx104
 image all α–KTx 29
image (D9U2A6) KA291_LYCMC α–KTx 29.1 Neurotoxin–F, Toxin LmKTx2
image (R4GUQ1) KA292_LYCMC α–KTx 29.2 Neurotoxin KTx3, Toxin LmKTx71
image (P0CI86) KA293_LYCMC α–KTx 29.3 Neurotoxin–E, Neurotoxin LmKTx95
 image all α–KTx 30
image (P0DL33) KA301_SCOR α–KTx 30.1 Toxin StKTx23
image (P0DL34) KA302_SCOJE α–KTx 30.2 Toxin SjKTx32
image (P0DL35) KA303_SCOJE α–KTx 30.3 Toxin SjKTx51
 image all α–KTx 31
image (P0DL62) KA311_BUTOC α–KTx 31.1 Toxin Kbot55
 image all β–KTx
 image all class 1 subfamily proteins
image (P69939) KBX1_ANDAU AaTXK–β, AaTXKβ, β–KTx 2
image (B8XH40) KBX1_BUTOS BuTXK–β, BuTXKβ, Tx690
image (Q9N661) KBX1_MESMA BmTXK–β–2, BmTX K–β2, BmTXKβ2, BmTX K β2', β–KTx 4
image (Q5G8A6) KBX1_TITCO Tco–β–KTx, TcoβKTx, Tco 41.46–2, Tco 42.14
image (Q0GY44) KBX1_TITDI Tdi–β–KTx, TdiβKTx
image (P69940) KBX1_TITSE TsTXK–β, Tityustoxin K–β, TsTX–K β, TsTX K β, TsTXKβ, TSK2, β–KTx 1
image (P0C2F3) KBX1_TITST Tst–β–KTx, TstβKTx
image (Q0GY46) KBX1_TITTR Ttr–β–KTx, TtrβKTx
image (P0CI49) KBX11_LYCMC Neurotoxin β–KTx 31.1
image (A9XE60) KBX11_MESEU MeuTXK–β–1, MeuTXKβ1
image (A9XE59) KBX12_MESEU MeuTXK–β–2, MeuTXKβ2
image (D9U2A7) KBX17_LYCMC Neurotoxin β–KTx 7
image (A0A059UI30) KBX1_MESGB Meg–beta–KTx1, MegbetaKTx1, Beta potassium channel toxin 1
 image all class 2 subfamily proteins
image (Q0GY41) KBX2_HADGE Hge–β–KTx, HgeβKTx
image (P0CH57) NDB51_MESEU MeuTXKβ3, BeL–5, BeL–69, Meucin–24, MeuTXKβ3
image (Q9NJC6) KBX2_MESMA BmTXK–β, BmTX K–β, BmTXKβ, BmKLK, β–KTx 3
image (Q0GY42) KBX2_TITCO TcoKIK
image (Q0GY43) KIK2_TITDI TdiKIK, TdKIK;
image (P0C8W4) KBX2_TITST TstKMK, Toxin 5536
image (P86822) KBX2_TITSE β–Ktx 2, Ts19
image (Q0GY45) KBX2_TITTR TtrKIK
image (P0CJ45) KBX21_LYCMC Neurotoxin β–KTx 52.1
image (D9U2B1) KBX22_LYCMC Neurotoxin β–KTx 12
image (P0CI42) KBX23_LYCMC Neurotoxin β–KTx 14.3
image (C6ZH27) KBX27_LYCMC Neurotoxin β–KTx 17
image (C7G3K3) KBX2_LIOAU Beta–KTx–like peptide LaIT2
 image all class 3 subfamily proteins
image (Q0GY40) KBX3_HADGE Hge–scorpine, Hg–scorpine–like 1, Hgscplike1, HgeScplp1, Hge36
image (P0C2F4) KBX3_HETLA Heteroscorpine–1, HS–1
image (C5J891) KBX3_OPICY Scorpine–like, OcyC7
image (P56972) KBX3_PANIM Scorpine, Scorpin, Panscorpine
image (P86121) KBX3L_OPICY Scorpine–like
image (Q5WR03) KBX31_OPICA Opiscorpine–1
image (P0C8W5) KBX32_HADGE Hg–scorpine–like 2, Hgscplike2, HgeScplp2
image (Q5WR01) KBX32_OPICA Opiscorpine–2
image (Q5WQZ7) KBX33_OPICA Opiscorpine–3
image (Q5WQZ9) KBX34_OPICA Opiscorpine–4
image (L0G8Z0) KBX31_UROYA Antimicrobial peptide scorpine–like–1, SCl1
image (L0GCW2) KBX32_UROYA Antimicrobial peptide scorpine–like–2, SCl2
image (P0DL47) KBX3_EUSVA Scorpine–like peptide Ev37
 image all γ–KTx
 image all γ–KTx 1
image (Q86QT3) KGX11_CENNO γ–KTx 1.1 Ergtoxin, ErgTx, Ergtoxin–like protein 1, ErgTx1, CnErg1, CnErgTx1
image (Q86QV6) KGX12_CENEL γ–KTx 1.2 Ergtoxin–like protein 1, ErgTx1, CeErg1, CeErgTx1
image (Q86QV3) KGX13_CENGR γ–KTx 1.3 Ergtoxin–like protein 1, ErgTx1, CgErg1, CgErgTx1
image (Q86QU6) KGX14_CENSC γ–KTx 1.4 Ergtoxin–like protein 1, ErgTx1, CsErg1, CsErgTx1
image (Q86QV0) KGX15_CENLI γ–KTx 1.5 Ergtoxin–like protein 1, ErgTx1, CllErg1, CllErgTx1
image (Q86QU1) KGX16_CENEX γ–KTx 1.6 Ergtoxin–like protein 1, ErgTx1, CexErg1, CexErgTx1
image (P0C892) KGX17_CENEL γ–KTx 1.7 CeErg4
image (P0C893) KGX18_CENEL γ–KTx 1.8 CeErg5
image (C0HJW3) KGX19_CENTE γ–KTx 1.9
image (C0HLM3) KGX1A_CENTE γ–KTx 1.10 CmERG1
 image all γ–KTx 2
image (Q9BKB7) KGX21_MESEU γ–KTx 2.1 Neurotoxin BeKm–1
image (P59938) KGX22_MESMA γ–KTx 2.2 Neurotoxin Kk7, BmKK7, BmKKx2
 image all γ–KTx 3
image (P59939) KGX31_CENNO γ–KTx 3.1 Ergtoxin–like protein 2, ErgTx2, CnErg2, CnErgTx2
image (Q86QV5) KGX32_CENEL γ–KTx 3.2 Ergtoxin–like protein 2, ErgTx2, CeErg2, CeErgTx2
image (Q86QU5) KGX33_CENSC γ–KTx 3.3 Ergtoxin–like protein 2, ErgTx2, CsErg2, CsErgTx2
image (Q86QV2) KGX34_CENGR γ–KTx 3.4 Ergtoxin–like protein 2, ErgTx2, CgErg2, CgErgTx2
 image all γ–KTx 4
image (Q86QU9) KGX41_CENLI γ–KTx 4.1 Ergtoxin–like protein 2, ErgTx2, CllErg2, CllErgTx2
image (Q86QV7) KGX42_CENNO γ–KTx 4.2 Ergtoxin–like protein 5, ErgTx5, CnErg5, CnErgTx5
image (Q86QU0) KGX43_CENEX γ–KTx 4.3 Ergtoxin–like protein 2, ErgTx2, CexErg2, CexErgTx2
image (Q86QT9) KGX44_CENEX γ–KTx 4.4 Ergtoxin–like protein 3, ErgTx3, CexErg3, CexErgTx3
image (Q86QT8) KGX45_CENEX γ–KTx 4.5 Ergtoxin–like protein 4, ErgTx4, CexErg4, CexErgTx4
image (Q86QU8) KGX46_CENLI γ–KTx 4.6 Ergtoxin–like protein 3, ErgTx3, CllErg3, CllErgTx3
image (Q86QU7) KGX47_CENLI γ–KTx 4.7 Ergtoxin–like protein 4, ErgTx4, CllErg4, CllErgTx4
image (Q86QV4) KGX48_CENEL γ–KTx 4.8 Ergtoxin–like protein 3, ErgTx3, CeErg3, CeErgTx3
image (Q86QU4) KGX49_CENSC γ–KTx 4.9 Ergtoxin–like protein 3, ErgTx3, CsErg3, CsErgTx3
image (Q86QU3) KGX4A_CENSC γ–KTx 4.10 Ergtoxin–like protein 4, ErgTx4, CsErg4, CsErgTx4
image (Q86QV8) KGX4B_CENNO γ–KTx 4.11 Ergtoxin–like protein 4, ErgTx4, CnErg4, CnErgTx4
image (P59940) KGX4C_CENSC γ–KTx 4.12 Neurotoxin CsEKerg1
image (Q86QV9) KGX4D_CENNO γ–KTx 4.13 Ergtoxin–like protein 3, ErgTx3, CnErg3, CnErgTx3
 image all γ–KTx 5
image (Q86QU2) KGX51_CENSC γ–KTx 5.1 Ergtoxin–like protein 5, ErgTx5, CsErg5, CsErgTx5
image (Q86QV1) KGX52_CENGR γ–KTx 5.2 Ergtoxin–like protein 3, ErgTx3, CgErg3, CgErgTx3
 image all δ–KTx
 image all δ–KTx 1
image (P0C8W3) VKT11_HADGE δ–KTx 1.1 Kunitz–type serine protease inhibitor Hg1
image (P0DJ47) VKT12_MESMA δ–KTx 1.2 Kunitz–type serine protease inhibitor BmKTT–3
 image all δ–KTx 2
image (P0DJ46) VKT21_LYCMC δ–KTx 2.1 Kunitz–type serine protease inhibitor LmKTT–1a, SdPII
image (P0DJ45) VKT22_LYCMC δ–KTx 2.2 Kunitz–type serine protease inhibitor LmKTT–1b, SdPI
image (P0DJ48) VKT23_LYCMC δ–KTx 2.3 Kunitz–type serine protease inhibitor LmKTT–1c
image (P0DJ49) VKT24_MESMA δ–KTx 2.4 Kunitz–type serine protease inhibitor BmKTT–1
 image all δ–KTx 3
image (P0DJ50) VKT31_MESMA δ–KTx 3.1 Kunitz–type serine protease inhibitor BmKTT–2
 image all ε–KTx
image (P0C174) KEX11_TITSE ε–KTx 1.1 TsPep1, Ts11
image (P0C175) KEX12_TITSE ε–KTx 1.2 TsPep2, Ts12
 image all κ–KTx
 image all κ–KTx 1
image (P82850) KKX11_HETFU κ–KTx 1.1 κ–hefutoxin–1, κ–HfTx1
image (P82850) κ–KTx 1.2 κ–hefutoxin–2, κ–HfTx2
image (P83655) KKX13_HETSP κ–KTx 1.3
image (P0DJ33) KKX14_HETPE κ–KTx 1.4 HSP009C
 image all κ–KTx 2
image (P0C1Z3) KKX21_OPIMA κ–KTx 2.1 Toxin OmTx1
image (P0C1Z3) KKX21_OPIMA κ–KTx 2.2 Toxin OmTx2
image (P0C1Z4) KKX23_OPIMA κ–KTx 2.3 Toxin OmTx3
image (P0C1Z3) KKX21_OPIMA κ–KTx 2.4 Toxin OmTx4
image (P86110) KKX25_OPICY κ–KTx 2.5 OcyC8, OcyKTx6
image (C5J893) KKX26_OPICY κ–KTx 2.6 OcyC9
image (P0DJ34) KKX27_HETPE κ–KTx 2.7 HSP053C.1, Toxin HeTx203, Toxin κ–KTx 2.6
image (P0DJ35) KKX28_HETPE κ–KTx 2.8 HSP053C.2, Toxin HeTx204, Toxin κ–KTx 2.7
 image all κ–KTx 3
image (P0DJ36) KKX31_HETPE κ–KTx 3.1 HSP040C.1
image (P0DJ37) KKX32_HETPE κ–KTx 3.2 HSP040C.3
image (P0DJ38) KKX33_HETPE κ–KTx 3.3 HSP040C.4
image (P0DJ39) KKX34_HETPE κ–KTx 3.4 HSP040C.5
 image all κ–KTx 4
image (P0DJ40) KKX41_HETPE κ–KTx 4.1 HSP040C.2
 image all κ–KTx 5
image (P0DJ41) KKX51_HETLA κ–KTx 5.1 HelaTx1
image (All peptides)