SEPTIN12

gene
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Also known as FLJ25410

Summary

SEPTIN12 (septin 12, HGNC:26348) is a protein-coding gene on chromosome 16p13.3, encoding Septin-12 (Q8IYM1). Filament-forming cytoskeletal GTPase.

This gene encodes a guanine-nucleotide binding protein and member of the septin family of cytoskeletal GTPases. Septins play important roles in cytokinesis, exocytosis, embryonic development, and membrane dynamics. Multiple transcript variants encoding different isoforms have been found for this gene.

Source: NCBI Gene 124404 — RefSeq curated summary.

At a glance

  • Gene–disease (curated): non-syndromic male infertility due to sperm motility disorder (Supportive, GenCC) — +1 more curated relationship
  • GWAS associations: 1
  • Clinical variants (ClinVar): 116 total
  • Phenotypes (HPO): 6
  • MANE Select transcript: NM_144605

Identifiers

Gene identifiers

FieldValue
HGNC IDHGNC:26348
Approved symbolSEPTIN12
Nameseptin 12
Location16p13.3
Locus typegene with protein product
StatusApproved
AliasesFLJ25410
Ensembl geneENSG00000140623
Ensembl biotypeprotein_coding
OMIM611562
Entrez124404

Gene structure

Transcript identifiers

Ensembl transcripts: 8 — 3 protein_coding, 3 nonsense_mediated_decay, 1 retained_intron, 1 protein_coding_CDS_not_defined

ENST00000268231, ENST00000396693, ENST00000587603, ENST00000588241, ENST00000590303, ENST00000590741, ENST00000591624, ENST00000591861

RefSeq mRNA: 2 — MANE Select: NM_144605 NM_001154458, NM_144605

CCDS: CCDS10522, CCDS53987

Canonical transcript exons

ENST00000268231 — 10 exons

ExonStartEnd
ENSE0000000018947776064777998
ENSE0000094418447836494783766
ENSE0000094418547834624783557
ENSE0000167485947882804788345
ENSE0000346577747859804786105
ENSE0000354248147780864778137
ENSE0000354689247858074785888
ENSE0000358283047839314784068
ENSE0000360626347796904779786
ENSE0000365577247874804787667

Expression profiles

Bgee: expression breadth ubiquitous, 117 present calls, max score 97.52.

FANTOM5 (CAGE): breadth tissue_specific, TPM avg 0.4027 / max 402.8189, expressed in 6 samples.

FANTOM5 promoters (2 alternative TSS)

Promoter IDTPM avgSamples expressed
1561190.39756
1561180.00522

Top tissues by expression

131 total, by Bgee expression score (0-100, higher = more expressed):

TissueAnatomy IDExpression scoreQuality
left testisUBERON:000453397.52gold quality
right testisUBERON:000453497.31gold quality
testisUBERON:000047397.17gold quality
male germ line stem cell (sensu Vertebrata) in testisCL:0000089 ∩ UBERON:000047393.02gold quality
cerebellar cortexUBERON:000212976.19gold quality
cerebellar hemisphereUBERON:000224576.04gold quality
cerebellumUBERON:000203776.00gold quality
right hemisphere of cerebellumUBERON:001489075.94gold quality
primary visual cortexUBERON:000243664.65gold quality
C1 segment of cervical spinal cordUBERON:000646963.15gold quality
medulla oblongataUBERON:000189661.98gold quality
mucosa of transverse colonUBERON:000499159.50gold quality
putamenUBERON:000187458.51gold quality
right frontal lobeUBERON:000281058.46gold quality
Brodmann (1909) area 9UBERON:001354058.19gold quality
Ammon’s hornUBERON:000195457.20gold quality
substantia nigraUBERON:000203857.05gold quality
brainUBERON:000095556.11gold quality
superior frontal gyrusUBERON:000266155.38gold quality
dorsolateral prefrontal cortexUBERON:000983455.13gold quality
hypothalamusUBERON:000189855.00gold quality
caudate nucleusUBERON:000187354.61gold quality
amygdalaUBERON:000187654.08gold quality
temporal lobeUBERON:000187153.71gold quality
cerebral cortexUBERON:000095652.80gold quality
granulocyteCL:000009452.66gold quality
anterior cingulate cortexUBERON:000983552.04gold quality
nucleus accumbensUBERON:000188251.67gold quality
frontal cortexUBERON:000187049.78gold quality
bone marrowUBERON:000237149.63gold quality

Single-cell (SCXA)

Detected in 1 experiment(s), a significant marker in 0.

ExperimentMarker?Max mean expression
E-ANND-3no1.95

Regulation

Is transcription factor: no

miRNA regulators (miRDB)

11 targeting SEPTIN12, top 30 by miRDB confidence (max_score; target_count = how many genes the miRNA targets in total — lower means more specific):

miRNAMax scoreAvg scoremiRNA target_count
HSA-MIR-6867-5P100.0082.213464
HSA-MIR-4708-3P99.5167.99870
HSA-MIR-150-3P99.4370.51920
HSA-MIR-330-3P99.4169.952521
HSA-MIR-428499.3665.251293
HSA-MIR-475298.7168.04833
HSA-MIR-770598.6967.47543
HSA-MIR-449098.5168.47943
HSA-MIR-365097.8864.89693
HSA-MIR-6854-5P96.7765.96848
HSA-MIR-4774-5P95.9268.27827

Literature-anchored findings (GeneRIF, showing 14)

  • While SEPT12 formed filamentous structures at interphase, it was localized to the central spindle and to midbody during anaphase and cytokinesis, respectively. (PMID:18047794)
  • Decreases in SEPTIN12 expression is associated with male infertility. (PMID:19359518)
  • Eight coding single-nucleotide polymorphisms in SEPTIN12 were detected in the patients with Sertoli cell-only syndrome. Analysis of the results suggest that SEPTIN12 might play a critical role in human spermatogenesis. (PMID:21636737)
  • The c.204G>C (Gln38His) variant in the SEPTIN12 gene was associated with increased susceptibility to azoospermia caused by meiotic arrest (PMID:22116646)
  • SEPT12 mutations cause male infertility with defective sperm annulus and disrupt sperm structural integrity (PMID:22275165)
  • SEPTIN12 genetic variants confer susceptibility to teratozoospermia (PMID:22479503)
  • we discovered that the SEPTIN12-microtubule complexes are critical for sperm formation during spermiogenesis (PMID:24213608)
  • results demonstrate the molecular architecture of SEPT12 filaments at the sperm annulus, their mechanical support of sperm motility, and their correlation with male infertility. (PMID:25588830)
  • In mature human spermatozoa, SEPT12 and NDC1 are majorly colocalized in the centrosome regions; however, NDC1 is only slightly co-expressed with SEPT12 at the annulus of the sperm tail. (PMID:27854341)
  • Single nucleotide polymorphism c.673C>A/p.Gln225Lys in SEPT12 gene is associated with male idiopathic infertility. (PMID:30488758)
  • the current work identified the promoter of the human SEPT12 gene and provided key evidence about its transcriptional regulation via E2 and 5alpha-DHT. (PMID:30513371)
  • Single-nucleotide polymorphism c.474G>A in the SEPT12 gene is a predisposing factor in male infertility. (PMID:31880374)
  • SEPTIN12 c.474 G > A polymorphism as a risk factor in teratozoospermic patients. (PMID:34057684)
  • SUN5 interacts with nuclear membrane LaminB1 and cytoskeletal GTPase Septin12 mediating the sperm head-and-tail junction. (PMID:38870534)

Cross-species orthologs

3 orthologs

OrganismSymbolGene ID
danio_rerioseptin12ENSDARG00000019191
mus_musculusSeptin12ENSMUSG00000022542
rattus_norvegicusSeptin12ENSRNOG00000003137

Paralogs (12): SEPTIN3 (ENSG00000100167), SEPTIN7 (ENSG00000122545), SEPTIN6 (ENSG00000125354), SEPTIN11 (ENSG00000138758), SEPTIN14 (ENSG00000154997), SEPTIN8 (ENSG00000164402), SEPTIN2 (ENSG00000168385), SEPTIN1 (ENSG00000180096), SEPTIN9 (ENSG00000184640), SEPTIN5 (ENSG00000184702), SEPTIN10 (ENSG00000186522), TMEM250 (ENSG00000238227)

Protein

Protein identifiers

Septin-12Q8IYM1 (reviewed: Q8IYM1)

All UniProt accessions (6): A0A140VJU2, Q8IYM1, K7EIJ5, K7EP57, K7EP92, K7ES86

UniProt curated annotations — full annotation on UniProt →

Function. Filament-forming cytoskeletal GTPase. Involved in spermatogenesis. Involved in the morphogenesis of sperm heads and the elongation of sperm tails probably implicating the association with alpha- and beta-tubulins. Forms a filamentous structure with SEPTIN7, SEPTIN6, SEPTIN2 and probably SEPTIN4 at the sperm annulus which is required for the structural integrity and motility of the sperm tail during postmeiotic differentiation. May play a role in cytokinesis (Potential).

Subunit / interactions. Septins polymerize into heterooligomeric protein complexes that form filaments, and can associate with cellular membranes, actin filaments and microtubules. GTPase activity is required for filament formation. Interacts with SEPTIN6 and SEPTIN11. Self-associates. Component of a septin core octameric complex consisting of SEPTIN12, SEPTIN7, SEPTIN6 and SEPTIN2 or SEPTIN4 in the order 12-7-6-2-2-6-7-12 or 12-7-6-4-4-6-7-12 and located in the sperm annulus; the octamer polymerizes into filaments via the SEPTIN12 N- and C-termini; the SEPTIN12:SEPTIN7 association is mediated by the respective GTP-binding domains. Interacts with SPAG4 and LMNB1. Associates with alpha- and beta-tubulins.

Subcellular location. Cytoplasm. Cytoskeleton. Spindle. Nucleus. Cell projection. Cilium. Flagellum.

Tissue specificity. Widely expressed. Expressed in lymph node.

Disease relevance. Spermatogenic failure 10 (SPGF10) [MIM:614822] An infertility disorder caused by spermatogenesis defects. It results in decreased sperm motility, concentration, and multiple sperm structural defects. The most prominent feature is a defective sperm annulus, a ring structure that demarcates the midpiece and the principal piece of the sperm tail. The disease is caused by variants affecting the gene represented in this entry.

Similarity. Belongs to the TRAFAC class TrmE-Era-EngA-EngB-Septin-like GTPase superfamily. Septin GTPase family.

Isoforms (2)

UniProt IDNamesCanonical?
Q8IYM1-11yes
Q8IYM1-22

RefSeq proteins (2): NP_001147930, NP_653206* (*=MANE)

Domains & families (InterPro)

IDNameType
IPR016491SeptinFamily
IPR027417P-loop_NTPaseHomologous_superfamily
IPR030379G_SEPTIN_domDomain

Pfam: PF00735

UniProt features (46 total): helix 11, strand 10, binding site 6, region of interest 6, sequence variant 3, sequence conflict 3, turn 2, chain 1, domain 1, splice variant 1, mutagenesis site 1, compositionally biased region 1

Structure

Experimental structures (PDB)

4 structures.

PDBMethodResolution (Å)
6MQ9X-RAY DIFFRACTION1.86
6MQBX-RAY DIFFRACTION2.12
6MQLX-RAY DIFFRACTION2.17
6MQKX-RAY DIFFRACTION2.19

Predicted structure (AlphaFold)

ModelpLDDTFraction very-high
AF-Q8IYM1-F182.260.59

Functional residue map

Curated UniProt residues grouped by drug-discovery relevance — catalytic, ligand-binding, modification, and mutation-validated positions. Source: UniProtKB sequence features.

Ligand- & substrate-binding residues (6): 89; 115; 195–203; 251; 266; 56–63

Mutagenesis-validated functional residues (1):

PositionPhenotype
56abolishes binding to gtp and to septin11, and also abolishes the ability of septin12 to form filamentous structures.

Function

Pathways and Gene Ontology

Reactome pathways

0 pathways

MSigDB gene sets: 86 (showing top): GOBP_MALE_GAMETE_GENERATION, GOBP_CYTOKINESIS, INGRAM_SHH_TARGETS_DN, MYB_Q3, GOBP_DEVELOPMENTAL_PROCESS_INVOLVED_IN_REPRODUCTION, MYB_Q5_01, GOCC_SPINDLE, GOBP_CYTOSKELETON_DEPENDENT_CYTOKINESIS, GOCC_ACTIN_FILAMENT_BUNDLE, GOCC_MOTILE_CILIUM, GOBP_CELL_DIVISION, GOCC_ACTOMYOSIN, GOCC_CELL_DIVISION_SITE, GOCC_MIDBODY, GOCC_PLASMA_MEMBRANE_REGION

GO Biological Process (5): spermatogenesis (GO:0007283), intracellular protein localization (GO:0008104), cell differentiation (GO:0030154), cytoskeleton-dependent cytokinesis (GO:0061640), cell division (GO:0051301)

GO Molecular Function (9): GTPase activity (GO:0003924), GTP binding (GO:0005525), GDP binding (GO:0019003), phosphatidylinositol binding (GO:0035091), identical protein binding (GO:0042802), protein homodimerization activity (GO:0042803), molecular adaptor activity (GO:0060090), nucleotide binding (GO:0000166), protein binding (GO:0005515)

GO Cellular Component (16): stress fiber (GO:0001725), nucleus (GO:0005634), spindle (GO:0005819), septin ring (GO:0005940), microtubule cytoskeleton (GO:0015630), midbody (GO:0030496), septin complex (GO:0031105), cell division site (GO:0032153), cleavage furrow (GO:0032154), perinuclear region of cytoplasm (GO:0048471), sperm annulus (GO:0097227), cytoplasm (GO:0005737), cytoskeleton (GO:0005856), cilium (GO:0005929), motile cilium (GO:0031514), cell projection (GO:0042995)

GO top-level categories

Rollup of top GO terms by namespace:

CategoryTerms
cellular anatomical structure6
guanyl ribonucleotide binding2
anion binding2
binding2
intracellular membraneless organelle2
cytoskeleton2
cell cortex2
septin cytoskeleton2
developmental process involved in reproduction1
male gamete generation1
macromolecule localization1
cellular developmental process1
cytokinesis1
cellular process1
ribonucleoside triphosphate phosphatase activity1
purine ribonucleoside triphosphate binding1
protein binding1
identical protein binding1
protein dimerization activity1
molecular_function1
nucleoside phosphate binding1
heterocyclic compound binding1
actomyosin1
contractile actin filament bundle1
intracellular membrane-bounded organelle1
microtubule cytoskeleton1
protein-containing complex1
cell division site1
plasma membrane region1
cytoplasm1
sperm flagellum1
intracellular anatomical structure1
intraciliary transport particle1
membrane-bounded organelle1
plasma membrane bounded cell projection1
cilium1

Protein interactions and networks

STRING

716 interactions, top by confidence (×1000):

Protein AProtein BPartner UniProtScore
SEPTIN12SEPTIN4O43236783
SEPTIN12SPAG4Q9NPE6543
SEPTIN12SUN3Q8TAQ9509
SEPTIN12SPATA46Q5T0L3496
SEPTIN12CDC42EP5Q6NZY7494
SEPTIN12DPY19L2Q6NUT2491
SEPTIN12TXNDC8Q6A555489
SEPTIN12DNAJB13P59910474
SEPTIN12SUN5Q8TC36474
SEPTIN12SEPTIN5Q99719469
SEPTIN12SUN2Q9UH99466
SEPTIN12SPATA16Q9BXB7463
SEPTIN12DNAH1Q9P2D7460
SEPTIN12NDC1Q9BTX1453
SEPTIN12SLAMF9Q96A28448

IntAct

90 interactions, top by confidence:

ABTypeScore
SEPTIN12SEPTIN6psi-mi:“MI:0915”(physical association)0.830
SEPTIN12SEPTIN6psi-mi:“MI:0403”(colocalization)0.830
SEPTIN12SEPTIN6psi-mi:“MI:0914”(association)0.830
SEPTIN5SEPTIN12psi-mi:“MI:0915”(physical association)0.830
SEPTIN12SEPTIN5psi-mi:“MI:0915”(physical association)0.830
SEPTIN6SEPTIN12psi-mi:“MI:0407”(direct interaction)0.830
SEPTIN6SEPTIN12psi-mi:“MI:0915”(physical association)0.830
SEPTIN12SEPTIN1psi-mi:“MI:0915”(physical association)0.800
SEPTIN1SEPTIN12psi-mi:“MI:0915”(physical association)0.800
SEPTIN12SEPTIN4psi-mi:“MI:0915”(physical association)0.730
SEPTIN12SEPTIN7psi-mi:“MI:0403”(colocalization)0.730
SEPTIN12SEPTIN4psi-mi:“MI:0403”(colocalization)0.730
SEPTIN12SEPTIN7psi-mi:“MI:0915”(physical association)0.730

BioGRID (52): SEPT12 (Two-hybrid), CCT7 (Affinity Capture-MS), SEPT4 (Affinity Capture-MS), SEPT2 (Affinity Capture-MS), SEPT7 (Affinity Capture-MS), SEPT5 (Affinity Capture-MS), SEPT6 (Affinity Capture-MS), SEPT8 (Affinity Capture-MS), SEPT11 (Affinity Capture-MS), SEPT10 (Affinity Capture-MS), CCT6B (Affinity Capture-MS), SEPT3 (Affinity Capture-MS), PDS5B (Affinity Capture-MS), RAP1GDS1 (Affinity Capture-MS), SEPT1 (Two-hybrid)

ESM2 similar proteins: A0A096MJN4, A2BGU8, A4FUM1, A5D7Q3, A5PJU9, A6QQL3, B0BNF1, B0KWP7, B1H120, B1MTN8, B2KIE9, B3GNI6, B5FW69, O36023, O43236, P28661, P32468, P40797, P42209, P48010, Q08DM7, Q0VC68, Q0VCP4, Q14141, Q2KJB1, Q3SZN0, Q4R4X5, Q4R555, Q4V8G5, Q5EB96, Q5PQK1, Q5R6R7, Q5REG8, Q6AXA6, Q6IRQ5, Q8C1B7, Q8C650, Q8CHH9, Q8IYM1, Q92599

Diamond homologs: A0A096MJN4, A0A3Q0KDV9, A1L0Y5, A2BGU8, A2VE99, A4FUM1, A5D7Q3, A5PJU9, A6QQL3, B0BNF1, B0KWP7, B1H120, B1MTN8, B2KIE9, B3GNI6, B5FW69, G1UB61, O36023, O43236, O55131, O60165, P25342, P28661, P32457, P32458, P32468, P39826, P39827, P40797, P41901, P42207, P42208, P42209, P48008, P48009, P48010, P54359, Q04921, Q08DM7, Q09116

SIGNOR signaling

1 interactions.

AEffectBMechanism
SEPTIN12down-regulatesSEPTIN6binding

Enriched among interaction partners

Reactome pathways and GO biological processes over-represented among this gene’s 23 IntAct physical interaction partners (hypergeometric vs the genome-wide background, BH-FDR, gene-set size 15–500, ranked by fold). A functional readout of the neighbourhood — distinct from this gene’s own memberships above, and biased toward well-studied / hub proteins, so read it as themes rather than proof.

GO biological processes:

GO termPartnersFoldFDR
cytoskeleton-dependent cytokinesis6218.9×7e-11
intracellular protein localization733.3×3e-07
spermatogenesis711.2×2e-04

Disease & clinical

Clinical variants and AI predictions

ClinVar

116 variants total. Per-class counts are floors (≥ shown; pagination cap):

ClassificationCount (floor)
Pathogenic0
Likely pathogenic0
Uncertain significance89
Likely benign8
Benign15

Top pathogenic / likely-pathogenic (0)

SpliceAI

1776 predictions. Top by Δscore:

VariantEffectΔscore
16:4777999:C:CCacceptor_gain1.0000
16:4779685:CTGA:Cdonor_loss1.0000
16:4779686:TGACC:Tdonor_loss1.0000
16:4779687:GACC:Gdonor_loss1.0000
16:4779689:C:CAdonor_loss1.0000
16:4779782:CGGTC:Cacceptor_gain1.0000
16:4779787:C:CCacceptor_gain1.0000
16:4779788:T:Gacceptor_loss1.0000
16:4783467:A:Cdonor_gain1.0000
16:4785802:CCTA:Cdonor_loss1.0000
16:4785803:CTAC:Cdonor_loss1.0000
16:4785805:A:ACdonor_gain1.0000
16:4785806:C:CCdonor_gain1.0000
16:4785884:TATGA:Tacceptor_gain1.0000
16:4785885:ATGA:Aacceptor_gain1.0000
16:4785886:TGA:Tacceptor_gain1.0000
16:4785887:GA:Gacceptor_gain1.0000
16:4785889:C:CCacceptor_gain1.0000
16:4785891:G:Cacceptor_gain1.0000
16:4785976:TCA:Tdonor_loss1.0000
16:4785977:CACC:Cdonor_loss1.0000
16:4785978:A:ACdonor_gain1.0000
16:4785978:ACCA:Adonor_loss1.0000
16:4785979:C:CCdonor_gain1.0000
16:4786101:TTGCC:Tacceptor_gain1.0000
16:4786102:TGCC:Tacceptor_gain1.0000
16:4786104:CC:Cacceptor_gain1.0000
16:4786105:CC:Cacceptor_gain1.0000
16:4786105:CCTGG:Cacceptor_loss1.0000
16:4786106:C:CAacceptor_loss1.0000

AlphaMissense

2360 scored. Top likely-pathogenic:

VariantProtein changeam_pathogenicity
16:4777943:G:TR311S0.996
16:4777942:C:GR311P0.995
16:4784021:A:GL141P0.995
16:4785833:G:CF116L0.994
16:4785833:G:TF116L0.994
16:4785835:A:GF116L0.994
16:4785858:A:GL108P0.993
16:4777981:A:GL298P0.992
16:4779716:C:GR266P0.992
16:4783698:G:TA194D0.992
16:4783973:C:GR157P0.992
16:4783998:G:TR149S0.992
16:4777969:G:AT302I0.991
16:4783980:C:GD155H0.991
16:4787480:C:AG56W0.991
16:4778095:A:GL289P0.990
16:4783668:C:GR204P0.990
16:4783683:A:GL199P0.990
16:4783974:G:CR157G0.990
16:4777943:G:CR311G0.989
16:4778118:A:CC281W0.989
16:4779776:G:TP246H0.989
16:4783701:A:TI193N0.989
16:4783960:G:CC161W0.989
16:4783962:A:GC161R0.989
16:4786090:C:TG61D0.989
16:4786105:C:TG56E0.989
16:4787480:C:GG56R0.989
16:4787480:C:TG56R0.989
16:4777951:T:AE308V0.988

dbSNP variants (sampled 300 via entrez): RS1000019392 (16:4782653 G>A,C), RS1000266886 (16:4789191 T>C), RS1000340856 (16:4789395 G>A,T), RS1000435659 (16:4780066 A>G), RS1000486573 (16:4780363 T>C), RS1000506423 (16:4777284 C>A), RS1000631884 (16:4790247 G>C), RS1000663083 (16:4790407 T>A), RS1000694825 (16:4784381 C>A,T), RS1000773815 (16:4779348 G>A), RS1000902338 (16:4782501 T>C), RS1000930505 (16:4791147 G>A), RS1001089016 (16:4778461 A>G,T), RS1001090054 (16:4787243 C>A), RS1001458062 (16:4778272 T>C)

Disease associations

OMIM: gene MIM:611562 | disease phenotypes: MIM:614822

GenCC curated gene-disease

DiseaseClassificationInheritance
non-syndromic male infertility due to sperm motility disorderSupportiveAutosomal recessive
spermatogenic failure 10LimitedAutosomal dominant

Mondo (2): spermatogenic failure 10 (MONDO:0013901), (MONDO:0017173)

Orphanet (1): Non-syndromic male infertility due to sperm motility disorder (Orphanet:276234)

HPO phenotypes

6 total (6 of 6 shown, HPO-id order):

HPOTerm
HP:0000006Autosomal dominant inheritance
HP:0000798Oligozoospermia
HP:0003251Male infertility
HP:0011462Young adult onset
HP:0012207Reduced sperm motility
HP:0012864Abnormal sperm morphology

GWAS associations

1 associations (top):

StudyTraitp-value
GCST003542_157Night sleep phenotypes1.000000e-06

Drugs & pharmacology

Drug and pharmacology data

Is drug target: no

PharmGKB: 1 entry (VIP=true, CPIC=false)

CTD chemical–gene interactions

6 total (human), top 6 by PubMed support.

ChemicalActions (top 5)PubMed papers
Arsenicaffects methylation1
Benzo(a)pyreneincreases methylation1
Tretinoinincreases expression1
Valproic Acidincreases methylation1
Okadaic Acidincreases expression1
Magnetite Nanoparticlesincreases expression1

Clinical trials (associated diseases)

0 trials via MONDO — disease-level, not drug-specific.