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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:increased marginal zone B cell number
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Accession:MP:0008181 term browser browse the term
Definition:greater number of CD23-negative, CD21-positive B cells of the marginal zone of the spleen expressing a B cell receptor usually reactive to bacterial cell wall components or senescent self components such as oxidized-LDL

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Path 1
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  mammalian phenotype 5402
    immune system phenotype 502
      abnormal immune system morphology 194
        abnormal immune system cell morphology 154
          abnormal professional antigen presenting cell morphology 39
            abnormal mature B cell morphology 3
              abnormal marginal zone B cell morphology 0
                increased marginal zone B cell number 0
Path 2
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  mammalian phenotype 5402
    hematopoietic system phenotype 250
      abnormal hematopoietic system morphology/development 230
        abnormal hematopoietic cell morphology 186
          abnormal leukocyte morphology 154
            abnormal mononuclear cell morphology 127
              abnormal lymphocyte morphology 99
                abnormal B cell morphology 29
                  abnormal B cell number 29
                    abnormal mature B cell number 11
                      increased mature B cell number 3
                        increased marginal zone B cell number 0
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