Incidental Mutation 'R1784:Kcnt2'
ID195988
Institutional Source Beutler Lab
Gene Symbol Kcnt2
Ensembl Gene ENSMUSG00000052726
Gene Namepotassium channel, subfamily T, member 2
SynonymsE330038N15Rik
MMRRC Submission 039815-MU
Accession Numbers
Is this an essential gene? Possibly non essential (E-score: 0.338) question?
Stock #R1784 (G1)
Quality Score225
Status Not validated
Chromosome1
Chromosomal Location140246158-140612067 bp(+) (GRCm38)
Type of Mutationmissense
DNA Base Change (assembly) G to A at 140354547 bp
ZygosityHeterozygous
Amino Acid Change Serine to Asparagine at position 90 (S90N)
Gene Model predicted gene model for transcript(s): [ENSMUST00000119786] [ENSMUST00000120709] [ENSMUST00000120796]
Predicted Effect probably benign
Transcript: ENSMUST00000060201
AA Change: S90N

PolyPhen 2 Score 0.000 (Sensitivity: 1.00; Specificity: 0.00)
SMART Domains Protein: ENSMUSP00000054623
Gene: ENSMUSG00000052726
AA Change: S90N

DomainStartEndE-ValueType
transmembrane domain 64 83 N/A INTRINSIC
transmembrane domain 103 125 N/A INTRINSIC
transmembrane domain 138 160 N/A INTRINSIC
Pfam:Ion_trans_2 199 282 2.8e-15 PFAM
Pfam:BK_channel_a 424 533 1.3e-31 PFAM
low complexity region 655 670 N/A INTRINSIC
low complexity region 677 689 N/A INTRINSIC
Predicted Effect probably benign
Transcript: ENSMUST00000119786
AA Change: S90N

PolyPhen 2 Score 0.000 (Sensitivity: 1.00; Specificity: 0.00)
SMART Domains Protein: ENSMUSP00000113535
Gene: ENSMUSG00000052726
AA Change: S90N

DomainStartEndE-ValueType
transmembrane domain 64 83 N/A INTRINSIC
transmembrane domain 103 125 N/A INTRINSIC
transmembrane domain 138 160 N/A INTRINSIC
Pfam:Ion_trans_2 199 282 2.6e-15 PFAM
Pfam:BK_channel_a 422 476 2.3e-16 PFAM
low complexity region 598 613 N/A INTRINSIC
low complexity region 620 632 N/A INTRINSIC
low complexity region 699 714 N/A INTRINSIC
Predicted Effect probably benign
Transcript: ENSMUST00000120709
AA Change: S90N

PolyPhen 2 Score 0.000 (Sensitivity: 1.00; Specificity: 0.00)
SMART Domains Protein: ENSMUSP00000112887
Gene: ENSMUSG00000052726
AA Change: S90N

DomainStartEndE-ValueType
transmembrane domain 64 83 N/A INTRINSIC
transmembrane domain 103 125 N/A INTRINSIC
transmembrane domain 138 160 N/A INTRINSIC
Pfam:Ion_trans_2 199 282 2.7e-15 PFAM
Pfam:BK_channel_a 422 527 1.5e-39 PFAM
low complexity region 648 663 N/A INTRINSIC
low complexity region 670 682 N/A INTRINSIC
low complexity region 749 764 N/A INTRINSIC
Predicted Effect probably benign
Transcript: ENSMUST00000120796
AA Change: S90N

PolyPhen 2 Score 0.000 (Sensitivity: 1.00; Specificity: 0.00)
SMART Domains Protein: ENSMUSP00000113333
Gene: ENSMUSG00000052726
AA Change: S90N

DomainStartEndE-ValueType
transmembrane domain 64 83 N/A INTRINSIC
transmembrane domain 103 125 N/A INTRINSIC
transmembrane domain 138 160 N/A INTRINSIC
Pfam:Ion_trans_2 199 282 2.8e-15 PFAM
Pfam:BK_channel_a 422 527 1.5e-39 PFAM
low complexity region 648 663 N/A INTRINSIC
low complexity region 670 682 N/A INTRINSIC
Coding Region Coverage
  • 1x: 97.5%
  • 3x: 97.0%
  • 10x: 95.5%
  • 20x: 93.2%
Validation Efficiency
MGI Phenotype PHENOTYPE: Mice homozygous for a null allele are viable with normal pain and itch responses. [provided by MGI curators]
Allele List at MGI
Other mutations in this stock
Total: 193 list
GeneRefVarChr/LocMutationPredicted EffectZygosity
4930453N24Rik T C 16: 64,769,022 I90V probably damaging Het
Acacb TGGGG TGGG 5: 114,209,767 probably null Het
Adamts17 C T 7: 67,149,956 R1060* probably null Het
Adamts5 T A 16: 85,877,915 K454* probably null Het
Adgrg6 T C 10: 14,439,782 T593A probably damaging Het
Aldh4a1 A G 4: 139,644,161 Y462C probably damaging Het
Ankrd12 G T 17: 65,984,076 P1454Q probably benign Het
Ap1m1 T A 8: 72,252,849 S230T probably benign Het
Aspm A G 1: 139,473,574 I1111V probably benign Het
Atp6ap1l T A 13: 90,905,281 K4N probably damaging Het
Boc T C 16: 44,496,419 T454A probably benign Het
Bola1 C T 3: 96,197,110 G56D probably benign Het
C4bp C G 1: 130,642,988 V284L probably benign Het
Cacna1s T C 1: 136,118,716 F1761S probably benign Het
Camsap2 C T 1: 136,281,315 R802Q probably benign Het
Capn9 G A 8: 124,605,711 G430R possibly damaging Het
Cbs G T 17: 31,620,949 A337E probably benign Het
Ccdc129 T C 6: 55,968,541 F749S probably benign Het
Ccdc186 A C 19: 56,809,220 H306Q probably benign Het
Cd180 T C 13: 102,705,859 L471P probably damaging Het
Cd55 C T 1: 130,449,423 V333I probably benign Het
Cd55 C A 1: 130,459,633 A143S probably benign Het
Cdk12 T C 11: 98,249,970 probably benign Het
Cfh C T 1: 140,147,697 V268I possibly damaging Het
Cfhr2 A G 1: 139,813,442 M265T probably benign Het
Cfhr2 A C 1: 139,813,459 N259K probably benign Het
Chil1 C T 1: 134,188,529 A250V probably damaging Het
Chit1 A G 1: 134,149,394 R312G possibly damaging Het
Chrna6 A T 8: 27,406,784 M355K possibly damaging Het
Clcn1 T A 6: 42,299,514 F360Y possibly damaging Het
Copa T A 1: 172,111,987 F597Y probably benign Het
Crb1 T C 1: 139,234,779 M1214V probably benign Het
Crb1 A T 1: 139,237,622 H921Q probably benign Het
Crb1 G A 1: 139,241,138 P881S probably damaging Het
Crb1 C T 1: 139,242,995 G825R probably damaging Het
Crb1 C T 1: 139,243,417 R684H probably benign Het
Crybg1 T A 10: 44,004,019 Q391L probably damaging Het
Cwh43 T C 5: 73,408,218 L42P probably damaging Het
Cxcr4 C T 1: 128,589,277 V216I probably benign Het
Cyb5r1 C T 1: 134,407,667 R147W probably damaging Het
Ddx59 T C 1: 136,417,053 V154A probably benign Het
Dnah17 C T 11: 118,069,519 C2572Y possibly damaging Het
Dnah9 G A 11: 66,085,020 T1401I possibly damaging Het
Dstyk C T 1: 132,456,984 L739F probably damaging Het
Elf2 A T 3: 51,257,572 V277D probably damaging Het
Etnk2 C T 1: 133,363,890 P43S probably benign Het
Etnk2 C A 1: 133,365,587 D89E probably benign Het
Etnk2 G T 1: 133,365,765 G149W probably damaging Het
Etnk2 C T 1: 133,365,816 R166* probably null Het
Etnk2 G A 1: 133,365,817 R166Q probably benign Het
Etnk2 T A 1: 133,376,915 V292E probably benign Het
Etnk2 G T 1: 133,377,046 A336S probably benign Het
Fam72a T C 1: 131,530,668 I56T probably benign Het
Fam72a C T 1: 131,538,895 T139M probably benign Het
Fat3 A C 9: 15,996,315 V2797G possibly damaging Het
Fbxl6 C T 15: 76,538,058 R137H probably damaging Het
Fcamr A C 1: 130,804,627 N117T probably benign Het
Fcamr A G 1: 130,811,580 I206V probably benign Het
Fcamr G A 1: 130,812,629 G262S probably benign Het
Fcamr A G 1: 130,812,692 I283V probably benign Het
Fcamr T C 1: 130,812,738 V298A probably benign Het
Fcamr A G 1: 130,812,809 M322V probably benign Het
Fcamr C T 1: 130,812,816 P324L probably benign Het
Fcamr A G 1: 130,814,597 N574D probably benign Het
Fcmr A G 1: 130,875,974 T172A probably benign Het
Fcmr T C 1: 130,878,269 S321P probably benign Het
Gabarap C T 11: 69,991,689 probably benign Het
Galnt17 A T 5: 131,150,963 H115Q probably benign Het
Gemin4 G C 11: 76,211,050 P962A probably damaging Het
Glrx2 C T 1: 143,739,740 A27V possibly damaging Het
Gm10563 C T 4: 155,635,880 probably benign Het
Gm12887 T A 4: 121,616,518 D45V probably benign Het
Gse1 G A 8: 120,568,253 probably benign Het
Guk1 A T 11: 59,185,312 V100E probably damaging Het
Heatr4 T C 12: 83,967,572 I630M probably benign Het
Hectd4 A T 5: 121,301,839 Y1134F possibly damaging Het
Ift20 G A 11: 78,540,034 E68K probably damaging Het
Igfn1 G A 1: 135,959,928 P2466L probably damaging Het
Igfn1 G A 1: 135,968,199 A1543V probably benign Het
Igfn1 T C 1: 135,970,411 S806G probably benign Het
Igfn1 C T 1: 135,972,127 R482Q probably benign Het
Igfn1 C T 1: 135,979,915 A231T probably benign Het
Igfn1 G A 1: 135,982,475 R124W probably benign Het
Igfn1 T C 1: 135,998,625 E29G probably benign Het
Igfn1 T C 1: 135,998,683 I10V unknown Het
Ikbke C A 1: 131,265,937 A459S probably benign Het
Ikbke T C 1: 131,269,823 S447G probably benign Het
Ipo9 ATCCTCCTCCTCCTCCTC ATCCTCCTCCTCCTCCTCCTC 1: 135,386,268 probably benign Het
Ipo9 A G 1: 135,402,250 V484A probably benign Het
Kcnh5 T C 12: 75,137,691 D86G probably benign Het
Kif14 A G 1: 136,468,279 N108D probably benign Het
Kif14 A G 1: 136,468,975 K340E probably damaging Het
Kif14 G A 1: 136,478,365 A556T probably benign Het
Kif14 A G 1: 136,490,332 S868G probably benign Het
Kif14 C T 1: 136,503,431 L1189F probably benign Het
Kif14 T C 1: 136,515,961 F1291L probably benign Het
Kif14 T C 1: 136,525,783 V1433A probably benign Het
Kif18b A G 11: 102,915,541 probably null Het
Kif21b A G 1: 136,160,121 I983V possibly damaging Het
Kpna3 T A 14: 61,367,701 E499V probably benign Het
Kremen1 GGG GGGTGG 11: 5,201,792 probably benign Het
Krt23 A T 11: 99,492,964 V34D probably damaging Het
Lad1 C T 1: 135,827,381 P132S possibly damaging Het
Lad1 C T 1: 135,828,023 R346C probably damaging Het
Lax1 T C 1: 133,679,978 R342G probably benign Het
Lax1 T C 1: 133,680,569 N145D probably benign Het
Lax1 G A 1: 133,683,634 P67S probably damaging Het
Lgr6 C T 1: 134,987,088 V641I probably benign Het
Lgr6 A T 1: 134,988,009 S334T probably benign Het
Lgr6 G T 1: 134,990,635 H263N probably benign Het
Lgr6 C T 1: 135,003,476 S3N probably benign Het
Lima1 G T 15: 99,780,463 P539Q possibly damaging Het
Lmod1 C T 1: 135,364,073 T222I probably benign Het
Megf10 T C 18: 57,240,792 probably null Het
Mrgbp T A 2: 180,585,449 N192K probably damaging Het
Mrgpra2b A G 7: 47,464,879 I35T probably benign Het
Mroh3 G C 1: 136,192,144 Q440E possibly damaging Het
Mrpl3 C T 9: 105,057,067 H130Y probably benign Het
Mybph C T 1: 134,197,480 R249C probably benign Het
Mycbp2 A T 14: 103,155,178 C3206S probably damaging Het
Nav1 A T 1: 135,584,727 D198E possibly damaging Het
Nbeal2 T A 9: 110,630,857 K1844* probably null Het
Ndufaf7 A T 17: 78,937,629 K59M probably damaging Het
Nr5a2 C A 1: 136,952,125 R35L probably benign Het
Obsl1 G A 1: 75,486,756 T1764M probably benign Het
Olfr453 C A 6: 42,744,135 L33M possibly damaging Het
Olfr870 A T 9: 20,170,913 Y219* probably null Het
Optc A T 1: 133,903,796 probably null Het
Optc C G 1: 133,905,170 S64T probably benign Het
Otoa T C 7: 121,125,439 V447A probably benign Het
Papss1 A G 3: 131,605,967 N319D probably benign Het
Pcdhb3 G A 18: 37,301,878 G299D probably damaging Het
Pcsk4 T C 10: 80,323,570 D432G probably damaging Het
Pde4b T C 4: 102,605,260 I711T probably benign Het
Pde5a G T 3: 122,748,240 L126F probably damaging Het
Pigr C T 1: 130,844,522 A159V possibly damaging Het
Pik3c2b C T 1: 133,066,627 P110S probably benign Het
Pinx1 A G 14: 63,878,110 probably null Het
Plekha6 C G 1: 133,287,846 T792S probably benign Het
Ppfia4 G A 1: 134,299,321 P1159S probably benign Het
Ppil2 C G 16: 17,089,419 probably benign Het
Prelp C T 1: 133,915,131 R92K probably benign Het
Prrx1 T A 1: 163,261,967 N97I probably damaging Het
Ptpn7 A G 1: 135,134,475 Q53R probably benign Het
Ptprc T G 1: 138,099,676 N478T probably benign Het
Ptprc A G 1: 138,107,823 S405P probably benign Het
Ptprc C A 1: 138,107,824 E402D probably benign Het
Ptprc A G 1: 138,107,837 V400A probably benign Het
Ptprc T C 1: 138,112,254 K212E possibly damaging Het
Rab29 A G 1: 131,872,110 Q141R probably benign Het
Rbsn A T 6: 92,190,019 L548Q possibly damaging Het
Ren1 C G 1: 133,350,778 probably null Het
Ren1 T A 1: 133,354,206 W22R probably damaging Het
Ren1 C T 1: 133,354,237 T32I probably benign Het
Ren1 A C 1: 133,356,457 K187Q probably benign Het
Ren1 A T 1: 133,359,079 E315D probably benign Het
Ren1 A T 1: 133,359,983 N352Y probably benign Het
Ren1 C G 1: 133,360,007 L360V probably benign Het
Rgs22 T A 15: 36,087,436 K445N probably damaging Het
Rint1 T A 5: 23,809,843 D352E probably benign Het
Rnpep C T 1: 135,263,096 A571T possibly damaging Het
Sept4 A T 11: 87,583,436 Q60L probably benign Het
Sis A T 3: 72,965,645 C53* probably null Het
Slain2 A G 5: 72,957,614 H396R probably damaging Het
Slc22a5 G A 11: 53,866,351 P491L probably damaging Het
Slc26a9 C T 1: 131,763,870 A617V probably benign Het
Slc26a9 C A 1: 131,766,012 R747S probably benign Het
Stab2 T G 10: 86,938,039 R809S probably benign Het
Tbc1d19 T G 5: 53,829,372 I41S probably damaging Het
Tbc1d31 T A 15: 57,963,920 H919Q possibly damaging Het
Thsd7b C T 1: 129,628,891 T328I probably damaging Het
Thsd7b T A 1: 129,667,937 F498Y probably benign Het
Thsd7b G C 1: 129,678,183 A554P probably benign Het
Thsd7b A C 1: 130,116,631 Q1116P probably benign Het
Tnfrsf25 T A 4: 152,118,304 probably null Het
Tnnt2 C T 1: 135,845,506 probably benign Het
Traf7 A G 17: 24,512,379 F228L probably damaging Het
Trim32 T A 4: 65,614,397 I397N probably damaging Het
Trove2 C T 1: 143,760,014 V465I probably benign Het
Trove2 T C 1: 143,760,034 D458G probably benign Het
Tubgcp2 T C 7: 139,998,055 T779A probably benign Het
Ube2t C T 1: 134,972,167 A149V probably benign Het
Upf2 A T 2: 6,027,450 S191C probably damaging Het
Usp42 T C 5: 143,714,626 D1214G probably damaging Het
Vcam1 T A 3: 116,114,515 I633L probably benign Het
Vmn2r73 T C 7: 85,857,878 Y742C probably damaging Het
Vmn2r81 C A 10: 79,270,655 T489K probably benign Het
Zc3h11a G A 1: 133,622,154 P695S probably benign Het
Zc3h11a C T 1: 133,624,621 V583I probably benign Het
Zfp169 C T 13: 48,489,819 A611T possibly damaging Het
Zfp281 GCGGCAGCTCCGGCAGC GCGGCAGCTCCGGCAGCTCCGGCAGC 1: 136,625,353 probably benign Het
Zp3r A G 1: 130,596,814 L164P probably benign Het
Zp3r C A 1: 130,619,414 E8D possibly damaging Het
Other mutations in Kcnt2
AlleleSourceChrCoordTypePredicted EffectPPH Score
IGL00561:Kcnt2 APN 1 140523098 missense probably damaging 1.00
IGL00673:Kcnt2 APN 1 140596051 missense possibly damaging 0.60
IGL00806:Kcnt2 APN 1 140523211 missense probably damaging 1.00
IGL01135:Kcnt2 APN 1 140354555 critical splice donor site probably null 0.00
IGL01412:Kcnt2 APN 1 140570417 missense probably benign 0.02
IGL01777:Kcnt2 APN 1 140595998 missense probably benign 0.20
IGL01780:Kcnt2 APN 1 140351269 missense probably benign 0.09
IGL02134:Kcnt2 APN 1 140376383 missense probably benign
IGL02350:Kcnt2 APN 1 140351269 missense probably benign 0.09
IGL02357:Kcnt2 APN 1 140351269 missense probably benign 0.09
IGL02481:Kcnt2 APN 1 140354561 splice site probably benign
IGL02483:Kcnt2 APN 1 140354561 splice site probably benign
IGL02866:Kcnt2 APN 1 140425248 missense probably damaging 1.00
IGL02891:Kcnt2 APN 1 140574806 missense probably damaging 1.00
IGL03007:Kcnt2 APN 1 140354507 missense possibly damaging 0.50
IGL03024:Kcnt2 APN 1 140570455 missense probably benign 0.00
IGL03231:Kcnt2 APN 1 140534002 intron probably benign
R0230:Kcnt2 UTSW 1 140246345 missense probably benign 0.00
R0367:Kcnt2 UTSW 1 140351225 missense probably damaging 1.00
R0486:Kcnt2 UTSW 1 140509480 nonsense probably null
R0543:Kcnt2 UTSW 1 140609614 missense probably damaging 1.00
R0849:Kcnt2 UTSW 1 140507762 missense probably damaging 1.00
R1123:Kcnt2 UTSW 1 140573608 missense probably damaging 1.00
R1156:Kcnt2 UTSW 1 140428855 missense probably damaging 1.00
R1425:Kcnt2 UTSW 1 140383028 missense probably damaging 1.00
R1530:Kcnt2 UTSW 1 140484232 nonsense probably null
R1546:Kcnt2 UTSW 1 140431378 missense probably benign 0.01
R1728:Kcnt2 UTSW 1 140354547 missense probably benign 0.00
R1729:Kcnt2 UTSW 1 140354547 missense probably benign 0.00
R1730:Kcnt2 UTSW 1 140354547 missense probably benign 0.00
R1739:Kcnt2 UTSW 1 140354547 missense probably benign 0.00
R1762:Kcnt2 UTSW 1 140354547 missense probably benign 0.00
R1783:Kcnt2 UTSW 1 140354547 missense probably benign 0.00
R1785:Kcnt2 UTSW 1 140354547 missense probably benign 0.00
R1862:Kcnt2 UTSW 1 140425330 missense probably damaging 1.00
R1887:Kcnt2 UTSW 1 140584247 missense probably damaging 0.99
R1889:Kcnt2 UTSW 1 140584293 missense probably damaging 1.00
R1894:Kcnt2 UTSW 1 140425341 missense probably damaging 1.00
R2005:Kcnt2 UTSW 1 140553018 missense probably damaging 0.98
R2044:Kcnt2 UTSW 1 140375154 missense probably benign 0.14
R2115:Kcnt2 UTSW 1 140552963 missense probably damaging 1.00
R2135:Kcnt2 UTSW 1 140428813 missense probably damaging 1.00
R2201:Kcnt2 UTSW 1 140509441 missense probably damaging 1.00
R2212:Kcnt2 UTSW 1 140530800 missense probably damaging 1.00
R2267:Kcnt2 UTSW 1 140573683 splice site probably null
R2442:Kcnt2 UTSW 1 140376353 missense possibly damaging 0.59
R3121:Kcnt2 UTSW 1 140428884 missense probably damaging 0.97
R3176:Kcnt2 UTSW 1 140609639 missense probably benign 0.16
R3276:Kcnt2 UTSW 1 140609639 missense probably benign 0.16
R3704:Kcnt2 UTSW 1 140533968 missense probably damaging 1.00
R3944:Kcnt2 UTSW 1 140584287 missense probably damaging 1.00
R4164:Kcnt2 UTSW 1 140609630 missense probably damaging 0.97
R4201:Kcnt2 UTSW 1 140425332 missense probably damaging 0.98
R4501:Kcnt2 UTSW 1 140552980 missense probably damaging 0.99
R4502:Kcnt2 UTSW 1 140507747 missense probably damaging 0.99
R4632:Kcnt2 UTSW 1 140523148 missense possibly damaging 0.90
R4758:Kcnt2 UTSW 1 140518897 missense probably damaging 1.00
R4790:Kcnt2 UTSW 1 140354516 missense probably damaging 0.99
R4892:Kcnt2 UTSW 1 140513025 nonsense probably null
R4973:Kcnt2 UTSW 1 140609650 missense probably damaging 1.00
R5154:Kcnt2 UTSW 1 140351256 missense possibly damaging 0.94
R5296:Kcnt2 UTSW 1 140609615 missense probably damaging 1.00
R5353:Kcnt2 UTSW 1 140426901 missense probably damaging 1.00
R5605:Kcnt2 UTSW 1 140574743 missense possibly damaging 0.59
R5806:Kcnt2 UTSW 1 140509496 missense probably damaging 1.00
R5887:Kcnt2 UTSW 1 140425366 missense probably damaging 1.00
R5917:Kcnt2 UTSW 1 140533928 missense probably damaging 0.99
R5961:Kcnt2 UTSW 1 140507702 missense possibly damaging 0.82
R6123:Kcnt2 UTSW 1 140362980 missense probably damaging 1.00
R6225:Kcnt2 UTSW 1 140426923 nonsense probably null
R6248:Kcnt2 UTSW 1 140509478 missense probably damaging 1.00
R6351:Kcnt2 UTSW 1 140375112 missense probably damaging 1.00
R6380:Kcnt2 UTSW 1 140509584 missense probably damaging 1.00
R6532:Kcnt2 UTSW 1 140584106 missense probably damaging 0.97
R6693:Kcnt2 UTSW 1 140351227 missense probably benign 0.00
R6817:Kcnt2 UTSW 1 140246193 unclassified probably benign
R6856:Kcnt2 UTSW 1 140596004 missense probably damaging 1.00
R6944:Kcnt2 UTSW 1 140584065 missense probably benign 0.00
R6971:Kcnt2 UTSW 1 140512908 missense probably benign 0.01
X0062:Kcnt2 UTSW 1 140512991 missense possibly damaging 0.50
Z1088:Kcnt2 UTSW 1 140573646 missense probably damaging 1.00
Z1088:Kcnt2 UTSW 1 140584158 nonsense probably null
Predicted Primers PCR Primer
(F):5'- CGGACAGACTTGAACCAACCTTGAC -3'
(R):5'- TGTGGAGACATGAGCCCATTTTCAAC -3'

Sequencing Primer
(F):5'- GACTTGAACCAACCTTGACATGATG -3'
(R):5'- TGAGCCCATTTTCAACTAATATTCAC -3'
Posted On2014-05-23