The Mouse Adult Gross Anatomy Ontology and Mammalian Phenotype Ontology are downloaded weekly from the Mouse Genome Informatics databases at Jackson Laboratories (ftp://ftp.informatics.jax.org/pub/reports/index.html). For more information about these ontologies, see the MGI Publications Page at http://www.informatics.jax.org/mgihome/other/publications.shtml.
any structural anomaly of a rapidly cycling mature B cell which have downregulated IgD expression and exhibit high levels of binding by peanut agglutinin (PNA), and are involved in T-dependent immune responses; germinal center B cells are found typically in the germinal centers of lymph nodes and spleen