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 terminally differentiated, post-mitotic, short-lived cell of the B cell lineage devoted to producing large amounts of immunoglobulin
Comment:
Plasma cells are terminally differentiated B cells and no longer respond to antigens or helper T cells. In addition, they no longer express surface Ig or surface MHC class II molecules, and they secrete antibody at high rates.