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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 platelet alpha-granule number
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Accession:MP:0020429 term browser browse the term
Definition:altered number of the most abundant secretory organelle found in blood platelets, and which store adhesive molecules such as von Willebrand factor and fibrinogen, growth factors and inflammatory and angiogenic mediators, which play crucial roles in inflammatory responses and tumor genesis

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  mammalian phenotype 5380
    hematopoietic system phenotype 244
      abnormal hematopoietic system morphology/development 224
        abnormal hematopoietic cell morphology 180
          abnormal myeloid cell morphology 102
            abnormal platelet morphology 13
              abnormal platelet alpha-granule morphology 1
                abnormal platelet alpha-granule number 0
                  decreased platelet alpha-granule number 0
                  increased platelet alpha-granule number 0
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