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Factor V
Pathway / Coagulation & thrombus formation

Factor V

F5protein

Factor V acts as a cofactor in the prothrombinase complex to amplify thrombin generation and drive fibrin polymerization during coronary thrombus formation.

Pathway placement
Cascade stepCoagulation & thrombus formation
Confidencehigh
RationaleCoagulation cofactor essential for thrombin generation; activated on platelet surface; directly participates in fibrin formation.
Also acts inPlatelet activation
Druggability
DruggableYes
Known drugs / candidates1
Small-molecule tractableYes
Antibody tractableYes
EnsemblENSG00000198734

Type I vs Type II discrimination

ScoresType-II-associated
R — rupture / Type-I
—
C — confounder / Type-II
89
A — assay feasibility
72
E — evidence strength
45
T1DI (composite)
4
Specificity differential (R−C)-73.9
Confounder panel (Type-II drivers)
1sepsis / systemic inflammationmag 2
2anemia / acute blood lossn/a
3hypovolemia / dehydrationn/a
4tachyarrhythmian/a
5hypoxemia / respiratory failuremag 3
6hypertensive emergencyn/a
7high-demand / peri-operative stressmag 3
Coverage: 3/7 confounders with evidence
Tier: deep-scored (abstract-extracted) · 3 supporting references. See the discrimination table for all markers.

Assay & specimen

Class-level default (no specific cleared assay)— generic method inferred from analyte class; confirm against a specific product insert before use.
Specimen
Serum or plasma
Collection tube
Serum separator (gold/red-top, SST) · K2/K3-EDTA (lavender-top)
Method / principle
Sandwich immunoassay (ELISA) — research-grade unless a cleared assay exists
Reagent / substrate
Matched anti-target antibody pair (capture + labeled detection)
Platform
ELISA microplate or multiplex (Luminex/MSD)
Turnaround · availability
Send-out / research · Research-grade (no universal clinical assay)

Literature evidence(11)