Rare diseases · Sign or symptom
Reduced tissue carnitine O-palmitoyltransferase 2 activity
HP:0012380
What it means
Reduced carnitine O-palmitoyltransferase (CPT II; EC 2.3.1.21) activity or level, leading to a reduced activity of the reaction: palmitoyl-CoA + L-carnitine = CoA + L-palmitoylcarnitine. (CPT II activity can be measured in tissues including fibroblasts, lymphoblasts, and skeletal muscle.
Rare diseases that can present with this4
The range is how often this sign appears among people diagnosed with each disease — it is not a probability of having any of them. Many of these signs also occur in common, non-rare conditions. A sign on this page is a conversation to have with a clinician, not a conclusion.
Part of the broader category
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Start free with EleplanThis page uses the Human Phenotype Ontology (2026-06-23) — Human Phenotype Ontology Consortium, hpo.jax.org. Disease associations from Orphanet (INSERM), CC BY 4.0. Content is educational and is not medical advice.