Term Name: memory B cell
Synonyms: memory B lymphocyte, memory B-cell, memory B-lymphocyte
Definition: A memory B cell is a mature B cell that is long-lived, readily activated upon re-encounter of its antigenic determinant, and has been selected for expression of higher affinity immunoglobulin. This cell type has the phenotype CD19-positive, CD20-positive, MHC Class II-positive, and CD138-negative.
Ontology: Cell Ontology [CL:0000787]

Relationships
is a type of: mature B cell
has subtype: Bm5 B cell class switched memory B cell double negative memory B cell IgD-negative memory B cell IgM memory B cell unswitched memory B cell
has_completed: B cell affinity maturation
has_plasma_membrane_part: CD27 molecule membrane-spanning 4-domains subfamily A member 1 MHC class II protein complex
lacks_plasma_membrane_part: syndecan-1