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The Mouse Adult Gross Anatomy Ontology and Mammalian Phenotype Ontology are downloaded weekly from the Mouse Genome Informatics databases at Jackson Laboratories ( For more information about these ontologies, see the MGI Publications Page at

Term:abnormal myelin sheath amount
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Accession:MP:0020457 term browser browse the term
Definition:any anomaly in the amount of myelin surrounding nerve fibers or axons

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decreased myelin sheath amount term browser
Symbol Object Name Evidence Notes Source PubMed Reference(s) RGD Reference(s) Position
G Hmbs hydroxymethylbilane synthase IAGP MGI PMID:30615115 NCBI chr 9:44,336,348...44,344,228
Ensembl chr 9:44,336,339...44,344,228
JBrowse link
G Pi4kb phosphatidylinositol 4-kinase beta IAGP MGI PMID:33106410 NCBI chr 3:94,974,731...95,006,937
Ensembl chr 3:94,974,731...95,006,843
JBrowse link

Term paths to the root
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Term Annotations click to browse term
  mammalian phenotype 15962
    nervous system phenotype 4370
      abnormal nervous system morphology 3408
        abnormal neuron morphology 1867
          abnormal neurite morphology 568
            abnormal axon morphology 273
              abnormal myelin sheath morphology 96
                abnormal myelin sheath amount 2
                  decreased myelin sheath amount 2
                  increased myelin sheath amount 0
paths to the root