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CD63 molecule
Pathway / Platelet adhesion & activation

CD63 molecule

CD63protein

CD63 exposure on platelet extracellular vesicles indicates granule secretion and platelet activation during thrombus formation.

Pathway placement
Cascade stepPlatelet adhesion & activation
Confidencehigh
RationalePlatelet δ-granule exocytosis and activation marker; reflects platelet exosome/microvesicle release.
Druggability
DruggableYes
Known drugs / candidates0
Small-molecule tractableNo
Antibody tractableYes
EnsemblENSG00000135404

Type I vs Type II discrimination

ScoresLow-confidence (proxy)
R — rupture / Type-I
71
C — confounder / Type-II
74
A — assay feasibility
68
E — evidence strength
30
T1DI (composite)
10
Specificity differential (R−C)-3.2
Confounder panel (Type-II drivers)
No confounder evidence retrieved.
Tier: light (literature co-occurrence proxy — lower confidence). 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(7)